refactor: split _markitdown.py into modular components

src/markitdown/__init__.py

@@ -2,7 +2,8 @@
 #
 # SPDX-License-Identifier: MIT
 
-from ._markitdown import MarkItDown, FileConversionException, UnsupportedFormatException
+from .core import (FileConversionException, MarkItDown,
+                   UnsupportedFormatException)
 
 __all__ = [
     "MarkItDown",

src/markitdown/__main__.py

@@ -4,8 +4,9 @@
 import argparse
 import sys
 from textwrap import dedent
+
 from .__about__ import __version__
-from ._markitdown import MarkItDown, DocumentConverterResult
+from .core import DocumentConverterResult, MarkItDown
 
 
 def main():

src/markitdown/converters/__init__.py

@@ -0,0 +1,3 @@
+from . import archive, base, document, media, text, web
+
+__all__ = ["archive", "base", "document", "media", "text", "web"]

src/markitdown/converters/archive.py

@@ -0,0 +1,135 @@
+import os
+import shutil
+import zipfile
+from typing import Any, Union
+
+from .base import DocumentConverter, DocumentConverterResult
+
+
+class ZipConverter(DocumentConverter):
+    """Converts ZIP files to markdown by extracting and converting all contained files.
+
+    The converter extracts the ZIP contents to a temporary directory, processes each file
+    using appropriate converters based on file extensions, and then combines the results
+    into a single markdown document. The temporary directory is cleaned up after processing.
+
+    Example output format:
+    ```markdown
+    Content from the zip file `example.zip`:
+
+    ## File: docs/readme.txt
+
+    This is the content of readme.txt
+    Multiple lines are preserved
+
+    ## File: images/example.jpg
+
+    ImageSize: 1920x1080
+    DateTimeOriginal: 2024-02-15 14:30:00
+    Description: A beautiful landscape photo
+
+    ## File: data/report.xlsx
+
+    ## Sheet1
+    | Column1 | Column2 | Column3 |
+    |---------|---------|---------|
+    | data1   | data2   | data3   |
+    | data4   | data5   | data6   |
+    ```
+
+    Key features:
+    - Maintains original file structure in headings
+    - Processes nested files recursively
+    - Uses appropriate converters for each file type
+    - Preserves formatting of converted content
+    - Cleans up temporary files after processing
+    """
+
+    def convert(
+        self, local_path: str, **kwargs: Any
+    ) -> Union[None, DocumentConverterResult]:
+        # Bail if not a ZIP
+        extension = kwargs.get("file_extension", "")
+        if extension.lower() != ".zip":
+            return None
+
+        # Get parent converters list if available
+        parent_converters = kwargs.get("_parent_converters", [])
+        if not parent_converters:
+            return DocumentConverterResult(
+                title=None,
+                text_content=f"[ERROR] No converters available to process zip contents from: {local_path}",
+            )
+
+        extracted_zip_folder_name = (
+            f"extracted_{os.path.basename(local_path).replace('.zip', '_zip')}"
+        )
+        extraction_dir = os.path.normpath(
+            os.path.join(os.path.dirname(local_path), extracted_zip_folder_name)
+        )
+        md_content = f"Content from the zip file `{os.path.basename(local_path)}`:\n\n"
+
+        try:
+            # Extract the zip file safely
+            with zipfile.ZipFile(local_path, "r") as zipObj:
+                # Safeguard against path traversal
+                for member in zipObj.namelist():
+                    member_path = os.path.normpath(os.path.join(extraction_dir, member))
+                    if (
+                        not os.path.commonprefix([extraction_dir, member_path])
+                        == extraction_dir
+                    ):
+                        raise ValueError(
+                            f"Path traversal detected in zip file: {member}"
+                        )
+
+                # Extract all files safely
+                zipObj.extractall(path=extraction_dir)
+
+            # Process each extracted file
+            for root, dirs, files in os.walk(extraction_dir):
+                for name in files:
+                    file_path = os.path.join(root, name)
+                    relative_path = os.path.relpath(file_path, extraction_dir)
+
+                    # Get file extension
+                    _, file_extension = os.path.splitext(name)
+
+                    # Update kwargs for the file
+                    file_kwargs = kwargs.copy()
+                    file_kwargs["file_extension"] = file_extension
+                    file_kwargs["_parent_converters"] = parent_converters
+
+                    # Try converting the file using available converters
+                    for converter in parent_converters:
+                        # Skip the zip converter to avoid infinite recursion
+                        if isinstance(converter, ZipConverter):
+                            continue
+
+                        result = converter.convert(file_path, **file_kwargs)
+                        if result is not None:
+                            md_content += f"\n## File: {relative_path}\n\n"
+                            md_content += result.text_content + "\n\n"
+                            break
+
+            # Clean up extracted files if specified
+            if kwargs.get("cleanup_extracted", True):
+                shutil.rmtree(extraction_dir)
+
+            return DocumentConverterResult(title=None, text_content=md_content.strip())
+
+        except zipfile.BadZipFile:
+            return DocumentConverterResult(
+                title=None,
+                text_content=f"[ERROR] Invalid or corrupted zip file: {local_path}",
+            )
+        except ValueError as ve:
+            return DocumentConverterResult(
+                title=None,
+                text_content=f"[ERROR] Security error in zip file {local_path}: {str(ve)}",
+            )
+        except Exception as e:
+            return DocumentConverterResult(
+                title=None,
+                text_content=f"[ERROR] Failed to process zip file {local_path}: {str(e)}",
+            )

src/markitdown/converters/base.py

@@ -0,0 +1,18 @@
+from typing import Any, Union
+
+
+class DocumentConverterResult:
+    """The result of converting a document to text."""
+
+    def __init__(self, title: Union[str, None] = None, text_content: str = ""):
+        self.title: Union[str, None] = title
+        self.text_content: str = text_content
+
+
+class DocumentConverter:
+    """Abstract superclass of all DocumentConverters."""
+
+    def convert(
+        self, local_path: str, **kwargs: Any
+    ) -> Union[None, DocumentConverterResult]:
+        raise NotImplementedError()

src/markitdown/converters/document.py

@@ -0,0 +1,195 @@
+import html
+import re
+from typing import Union
+
+import mammoth
+import pandas as pd
+import pdfminer
+import pptx
+
+from .base import DocumentConverter, DocumentConverterResult
+from .web import HtmlConverter
+
+
+class PdfConverter(DocumentConverter):
+    """
+    Converts PDFs to Markdown. Most style information is ignored, so the results are essentially plain-text.
+    """
+
+    def convert(self, local_path, **kwargs) -> Union[None, DocumentConverterResult]:
+        # Bail if not a PDF
+        extension = kwargs.get("file_extension", "")
+        if extension.lower() != ".pdf":
+            return None
+
+        return DocumentConverterResult(
+            title=None,
+            text_content=pdfminer.high_level.extract_text(local_path),
+        )
+
+
+class DocxConverter(HtmlConverter):
+    """
+    Converts DOCX files to Markdown. Style information (e.g.m headings) and tables are preserved where possible.
+    """
+
+    def convert(self, local_path, **kwargs) -> Union[None, DocumentConverterResult]:
+        # Bail if not a DOCX
+        extension = kwargs.get("file_extension", "")
+        if extension.lower() != ".docx":
+            return None
+
+        result = None
+        with open(local_path, "rb") as docx_file:
+            style_map = kwargs.get("style_map", None)
+
+            result = mammoth.convert_to_html(docx_file, style_map=style_map)
+            html_content = result.value
+            result = self._convert(html_content)
+
+        return result
+
+
+class XlsxConverter(HtmlConverter):
+    """
+    Converts XLSX files to Markdown, with each sheet presented as a separate Markdown table.
+    """
+
+    def convert(self, local_path, **kwargs) -> Union[None, DocumentConverterResult]:
+        # Bail if not a XLSX
+        extension = kwargs.get("file_extension", "")
+        if extension.lower() != ".xlsx":
+            return None
+
+        sheets = pd.read_excel(local_path, sheet_name=None)
+        md_content = ""
+        for s in sheets:
+            md_content += f"## {s}\n"
+            html_content = sheets[s].to_html(index=False)
+            md_content += self._convert(html_content).text_content.strip() + "\n\n"
+
+        return DocumentConverterResult(
+            title=None,
+            text_content=md_content.strip(),
+        )
+
+
+class PptxConverter(HtmlConverter):
+    """
+    Converts PPTX files to Markdown. Supports heading, tables and images with alt text.
+    """
+
+    def convert(self, local_path, **kwargs) -> Union[None, DocumentConverterResult]:
+        # Bail if not a PPTX
+        extension = kwargs.get("file_extension", "")
+        if extension.lower() != ".pptx":
+            return None
+
+        md_content = ""
+
+        presentation = pptx.Presentation(local_path)
+        slide_num = 0
+        for slide in presentation.slides:
+            slide_num += 1
+
+            md_content += f"\n\n<!-- Slide number: {slide_num} -->\n"
+
+            title = slide.shapes.title
+            for shape in slide.shapes:
+                # Pictures
+                if self._is_picture(shape):
+                    # https://github.com/scanny/python-pptx/pull/512#issuecomment-1713100069
+                    alt_text = ""
+                    try:
+                        alt_text = shape._element._nvXxPr.cNvPr.attrib.get("descr", "")
+                    except Exception:
+                        pass
+
+                    # A placeholder name
+                    filename = re.sub(r"\W", "", shape.name) + ".jpg"
+                    md_content += (
+                        "\n!["
+                        + (alt_text if alt_text else shape.name)
+                        + "]("
+                        + filename
+                        + ")\n"
+                    )
+
+                # Tables
+                if self._is_table(shape):
+                    html_table = "<html><body><table>"
+                    first_row = True
+                    for row in shape.table.rows:
+                        html_table += "<tr>"
+                        for cell in row.cells:
+                            if first_row:
+                                html_table += "<th>" + html.escape(cell.text) + "</th>"
+                            else:
+                                html_table += "<td>" + html.escape(cell.text) + "</td>"
+                        html_table += "</tr>"
+                        first_row = False
+                    html_table += "</table></body></html>"
+                    md_content += (
+                        "\n" + self._convert(html_table).text_content.strip() + "\n"
+                    )
+
+                # Charts
+                if shape.has_chart:
+                    md_content += self._convert_chart_to_markdown(shape.chart)
+
+                # Text areas
+                elif shape.has_text_frame:
+                    if shape == title:
+                        md_content += "# " + shape.text.lstrip() + "\n"
+                    else:
+                        md_content += shape.text + "\n"
+
+            md_content = md_content.strip()
+
+            if slide.has_notes_slide:
+                md_content += "\n\n### Notes:\n"
+                notes_frame = slide.notes_slide.notes_text_frame
+                if notes_frame is not None:
+                    md_content += notes_frame.text
+                md_content = md_content.strip()
+
+        return DocumentConverterResult(
+            title=None,
+            text_content=md_content.strip(),
+        )
+
+    def _is_picture(self, shape):
+        if shape.shape_type == pptx.enum.shapes.MSO_SHAPE_TYPE.PICTURE:
+            return True
+        if shape.shape_type == pptx.enum.shapes.MSO_SHAPE_TYPE.PLACEHOLDER:
+            if hasattr(shape, "image"):
+                return True
+        return False
+
+    def _is_table(self, shape):
+        if shape.shape_type == pptx.enum.shapes.MSO_SHAPE_TYPE.TABLE:
+            return True
+        return False
+
+    def _convert_chart_to_markdown(self, chart):
+        md = "\n\n### Chart"
+        if chart.has_title:
+            md += f": {chart.chart_title.text_frame.text}"
+        md += "\n\n"
+        data = []
+        category_names = [c.label for c in chart.plots[0].categories]
+        series_names = [s.name for s in chart.series]
+        data.append(["Category"] + series_names)
+
+        for idx, category in enumerate(category_names):
+            row = [category]
+            for series in chart.series:
+                row.append(series.values[idx])
+            data.append(row)
+
+        markdown_table = []
+        for row in data:
+            markdown_table.append("| " + " | ".join(map(str, row)) + " |")
+        header = markdown_table[0]
+        separator = "|" + "|".join(["---"] * len(data[0])) + "|"
+        return md + "\n".join([header, separator] + markdown_table[1:])

src/markitdown/converters/media.py

@@ -0,0 +1,246 @@
+import base64
+import json
+import mimetypes
+import os
+import shutil
+import subprocess
+import tempfile
+from typing import Union
+from warnings import catch_warnings, resetwarnings
+
+from .base import DocumentConverter, DocumentConverterResult
+
+# Optional Transcription support
+try:
+    # Using warnings' catch_warnings to catch
+    # pydub's warning of ffmpeg or avconv missing
+    with catch_warnings(record=True) as w:
+        import pydub
+
+        if w:
+            raise ModuleNotFoundError
+    import speech_recognition as sr
+
+    IS_AUDIO_TRANSCRIPTION_CAPABLE = True
+except ModuleNotFoundError:
+    pass
+finally:
+    resetwarnings()
+
+
+class MediaConverter(DocumentConverter):
+    """
+    Abstract class for multi-modal media (e.g., images and audio)
+    """
+
+    def _get_metadata(self, local_path):
+        exiftool = shutil.which("exiftool")
+        if not exiftool:
+            return None
+        else:
+            try:
+                result = subprocess.run(
+                    [exiftool, "-json", local_path], capture_output=True, text=True
+                ).stdout
+                return json.loads(result)[0]
+            except Exception:
+                return None
+
+
+class WavConverter(MediaConverter):
+    """
+    Converts WAV files to markdown via extraction of metadata (if `exiftool` is installed), and speech transcription (if `speech_recognition` is installed).
+    """
+
+    def convert(self, local_path, **kwargs) -> Union[None, DocumentConverterResult]:
+        # Bail if not a WAV
+        extension = kwargs.get("file_extension", "")
+        if extension.lower() != ".wav":
+            return None
+
+        md_content = ""
+
+        # Add metadata
+        metadata = self._get_metadata(local_path)
+        if metadata:
+            for f in [
+                "Title",
+                "Artist",
+                "Author",
+                "Band",
+                "Album",
+                "Genre",
+                "Track",
+                "DateTimeOriginal",
+                "CreateDate",
+                "Duration",
+            ]:
+                if f in metadata:
+                    md_content += f"{f}: {metadata[f]}\n"
+
+        # Transcribe
+        if IS_AUDIO_TRANSCRIPTION_CAPABLE:
+            try:
+                transcript = self._transcribe_audio(local_path)
+                md_content += "\n\n### Audio Transcript:\n" + (
+                    "[No speech detected]" if transcript == "" else transcript
+                )
+            except Exception:
+                md_content += (
+                    "\n\n### Audio Transcript:\nError. Could not transcribe this audio."
+                )
+
+        return DocumentConverterResult(
+            title=None,
+            text_content=md_content.strip(),
+        )
+
+    def _transcribe_audio(self, local_path) -> str:
+        recognizer = sr.Recognizer()
+        with sr.AudioFile(local_path) as source:
+            audio = recognizer.record(source)
+            return recognizer.recognize_google(audio).strip()
+
+
+class Mp3Converter(WavConverter):
+    """
+    Converts MP3 files to markdown via extraction of metadata (if `exiftool` is installed), and speech transcription (if `speech_recognition` AND `pydub` are installed).
+    """
+
+    def convert(self, local_path, **kwargs) -> Union[None, DocumentConverterResult]:
+        # Bail if not a MP3
+        extension = kwargs.get("file_extension", "")
+        if extension.lower() != ".mp3":
+            return None
+
+        md_content = ""
+
+        # Add metadata
+        metadata = self._get_metadata(local_path)
+        if metadata:
+            for f in [
+                "Title",
+                "Artist",
+                "Author",
+                "Band",
+                "Album",
+                "Genre",
+                "Track",
+                "DateTimeOriginal",
+                "CreateDate",
+                "Duration",
+            ]:
+                if f in metadata:
+                    md_content += f"{f}: {metadata[f]}\n"
+
+        # Transcribe
+        if IS_AUDIO_TRANSCRIPTION_CAPABLE:
+            handle, temp_path = tempfile.mkstemp(suffix=".wav")
+            os.close(handle)
+            try:
+                sound = pydub.AudioSegment.from_mp3(local_path)
+                sound.export(temp_path, format="wav")
+
+                _args = dict()
+                _args.update(kwargs)
+                _args["file_extension"] = ".wav"
+
+                try:
+                    transcript = super()._transcribe_audio(temp_path).strip()
+                    md_content += "\n\n### Audio Transcript:\n" + (
+                        "[No speech detected]" if transcript == "" else transcript
+                    )
+                except Exception:
+                    md_content += "\n\n### Audio Transcript:\nError. Could not transcribe this audio."
+
+            finally:
+                os.unlink(temp_path)
+
+        # Return the result
+        return DocumentConverterResult(
+            title=None,
+            text_content=md_content.strip(),
+        )
+
+
+class ImageConverter(MediaConverter):
+    """
+    Converts images to markdown via extraction of metadata (if `exiftool` is installed), OCR (if `easyocr` is installed), and description via a multimodal LLM (if an llm_client is configured).
+    """
+
+    def convert(self, local_path, **kwargs) -> Union[None, DocumentConverterResult]:
+        # Bail if not an image
+        extension = kwargs.get("file_extension", "")
+        if extension.lower() not in [".jpg", ".jpeg", ".png"]:
+            return None
+
+        md_content = ""
+
+        # Add metadata
+        metadata = self._get_metadata(local_path)
+        if metadata:
+            for f in [
+                "ImageSize",
+                "Title",
+                "Caption",
+                "Description",
+                "Keywords",
+                "Artist",
+                "Author",
+                "DateTimeOriginal",
+                "CreateDate",
+                "GPSPosition",
+            ]:
+                if f in metadata:
+                    md_content += f"{f}: {metadata[f]}\n"
+
+        # Try describing the image with GPTV
+        llm_client = kwargs.get("llm_client")
+        llm_model = kwargs.get("llm_model")
+        if llm_client is not None and llm_model is not None:
+            md_content += (
+                "\n# Description:\n"
+                + self._get_llm_description(
+                    local_path,
+                    extension,
+                    llm_client,
+                    llm_model,
+                    prompt=kwargs.get("llm_prompt"),
+                ).strip()
+                + "\n"
+            )
+
+        return DocumentConverterResult(
+            title=None,
+            text_content=md_content,
+        )
+
+    def _get_llm_description(self, local_path, extension, client, model, prompt=None):
+        if prompt is None or prompt.strip() == "":
+            prompt = "Write a detailed caption for this image."
+
+        data_uri = ""
+        with open(local_path, "rb") as image_file:
+            content_type, encoding = mimetypes.guess_type("_dummy" + extension)
+            if content_type is None:
+                content_type = "image/jpeg"
+            image_base64 = base64.b64encode(image_file.read()).decode("utf-8")
+            data_uri = f"data:{content_type};base64,{image_base64}"
+
+        messages = [
+            {
+                "role": "user",
+                "content": [
+                    {"type": "text", "text": prompt},
+                    {
+                        "type": "image_url",
+                        "image_url": {
+                            "url": data_uri,
+                        },
+                    },
+                ],
+            }
+        ]
+
+        response = client.chat.completions.create(model=model, messages=messages)
+        return response.choices[0].message.content

src/markitdown/converters/text.py

@@ -0,0 +1,234 @@
+import json
+import mimetypes
+import traceback
+from typing import Any, Union
+from xml.dom import minidom
+
+from bs4 import BeautifulSoup
+from charset_normalizer import from_path
+
+from ..core import _CustomMarkdownify
+from ..exceptions import FileConversionException
+from .base import DocumentConverter, DocumentConverterResult
+
+
+class PlainTextConverter(DocumentConverter):
+    """Anything with content type text/plain"""
+
+    def convert(
+        self, local_path: str, **kwargs: Any
+    ) -> Union[None, DocumentConverterResult]:
+        # Guess the content type from any file extension that might be around
+        content_type, _ = mimetypes.guess_type(
+            "__placeholder" + kwargs.get("file_extension", "")
+        )
+
+        # Only accept text files
+        if content_type is None:
+            return None
+        elif "text/" not in content_type.lower():
+            return None
+
+        text_content = str(from_path(local_path).best())
+        return DocumentConverterResult(
+            title=None,
+            text_content=text_content,
+        )
+
+
+class RSSConverter(DocumentConverter):
+    """Convert RSS / Atom type to markdown"""
+
+    def convert(
+        self, local_path: str, **kwargs
+    ) -> Union[None, DocumentConverterResult]:
+        # Bail if not RSS type
+        extension = kwargs.get("file_extension", "")
+        if extension.lower() not in [".xml", ".rss", ".atom"]:
+            return None
+        try:
+            doc = minidom.parse(local_path)
+        except BaseException as _:
+            return None
+        result = None
+        if doc.getElementsByTagName("rss"):
+            # A RSS feed must have a root element of <rss>
+            result = self._parse_rss_type(doc)
+        elif doc.getElementsByTagName("feed"):
+            root = doc.getElementsByTagName("feed")[0]
+            if root.getElementsByTagName("entry"):
+                # An Atom feed must have a root element of <feed> and at least one <entry>
+                result = self._parse_atom_type(doc)
+            else:
+                return None
+        else:
+            # not rss or atom
+            return None
+
+        return result
+
+    def _parse_atom_type(
+        self, doc: minidom.Document
+    ) -> Union[None, DocumentConverterResult]:
+        """Parse the type of an Atom feed.
+
+        Returns None if the feed type is not recognized or something goes wrong.
+        """
+        try:
+            root = doc.getElementsByTagName("feed")[0]
+            title = self._get_data_by_tag_name(root, "title")
+            subtitle = self._get_data_by_tag_name(root, "subtitle")
+            entries = root.getElementsByTagName("entry")
+            md_text = f"# {title}\n"
+            if subtitle:
+                md_text += f"{subtitle}\n"
+            for entry in entries:
+                entry_title = self._get_data_by_tag_name(entry, "title")
+                entry_summary = self._get_data_by_tag_name(entry, "summary")
+                entry_updated = self._get_data_by_tag_name(entry, "updated")
+                entry_content = self._get_data_by_tag_name(entry, "content")
+
+                if entry_title:
+                    md_text += f"\n## {entry_title}\n"
+                if entry_updated:
+                    md_text += f"Updated on: {entry_updated}\n"
+                if entry_summary:
+                    md_text += self._parse_content(entry_summary)
+                if entry_content:
+                    md_text += self._parse_content(entry_content)
+
+            return DocumentConverterResult(
+                title=title,
+                text_content=md_text,
+            )
+        except BaseException as _:
+            return None
+
+    def _parse_rss_type(
+        self, doc: minidom.Document
+    ) -> Union[None, DocumentConverterResult]:
+        """Parse the type of an RSS feed.
+
+        Returns None if the feed type is not recognized or something goes wrong.
+        """
+        try:
+            root = doc.getElementsByTagName("rss")[0]
+            channel = root.getElementsByTagName("channel")
+            if not channel:
+                return None
+            channel = channel[0]
+            channel_title = self._get_data_by_tag_name(channel, "title")
+            channel_description = self._get_data_by_tag_name(channel, "description")
+            items = channel.getElementsByTagName("item")
+            if channel_title:
+                md_text = f"# {channel_title}\n"
+            if channel_description:
+                md_text += f"{channel_description}\n"
+            if not items:
+                items = []
+            for item in items:
+                title = self._get_data_by_tag_name(item, "title")
+                description = self._get_data_by_tag_name(item, "description")
+                pubDate = self._get_data_by_tag_name(item, "pubDate")
+                content = self._get_data_by_tag_name(item, "content:encoded")
+
+                if title:
+                    md_text += f"\n## {title}\n"
+                if pubDate:
+                    md_text += f"Published on: {pubDate}\n"
+                if description:
+                    md_text += self._parse_content(description)
+                if content:
+                    md_text += self._parse_content(content)
+
+            return DocumentConverterResult(
+                title=channel_title,
+                text_content=md_text,
+            )
+        except BaseException as _:
+            print(traceback.format_exc())
+            return None
+
+    def _parse_content(self, content: str) -> str:
+        """Parse the content of an RSS feed item"""
+        try:
+            # using bs4 because many RSS feeds have HTML-styled content
+            soup = BeautifulSoup(content, "html.parser")
+            return _CustomMarkdownify().convert_soup(soup)
+        except BaseException as _:
+            return content
+
+    def _get_data_by_tag_name(
+        self, element: minidom.Element, tag_name: str
+    ) -> Union[str, None]:
+        """Get data from first child element with the given tag name.
+        Returns None when no such element is found.
+        """
+        nodes = element.getElementsByTagName(tag_name)
+        if not nodes:
+            return None
+        fc = nodes[0].firstChild
+        if fc:
+            return fc.data
+        return None
+
+
+class IpynbConverter(DocumentConverter):
+    """Converts Jupyter Notebook (.ipynb) files to Markdown."""
+
+    def convert(
+        self, local_path: str, **kwargs: Any
+    ) -> Union[None, DocumentConverterResult]:
+        # Bail if not ipynb
+        extension = kwargs.get("file_extension", "")
+        if extension.lower() != ".ipynb":
+            return None
+
+        # Parse and convert the notebook
+        result = None
+        with open(local_path, "rt", encoding="utf-8") as fh:
+            notebook_content = json.load(fh)
+            result = self._convert(notebook_content)
+
+        return result
+
+    def _convert(self, notebook_content: dict) -> Union[None, DocumentConverterResult]:
+        """Helper function that converts notebook JSON content to Markdown."""
+        try:
+            md_output = []
+            title = None
+
+            for cell in notebook_content.get("cells", []):
+                cell_type = cell.get("cell_type", "")
+                source_lines = cell.get("source", [])
+
+                if cell_type == "markdown":
+                    md_output.append("".join(source_lines))
+
+                    # Extract the first # heading as title if not already found
+                    if title is None:
+                        for line in source_lines:
+                            if line.startswith("# "):
+                                title = line.lstrip("# ").strip()
+                                break
+
+                elif cell_type == "code":
+                    # Code cells are wrapped in Markdown code blocks
+                    md_output.append(f"```python\n{''.join(source_lines)}\n```")
+                elif cell_type == "raw":
+                    md_output.append(f"```\n{''.join(source_lines)}\n```")
+
+            md_text = "\n\n".join(md_output)
+
+            # Check for title in notebook metadata
+            title = notebook_content.get("metadata", {}).get("title", title)
+
+            return DocumentConverterResult(
+                title=title,
+                text_content=md_text,
+            )
+
+        except Exception as e:
+            raise FileConversionException(
+                f"Error converting .ipynb file: {str(e)}"
+            ) from e

src/markitdown/converters/web.py

@@ -0,0 +1,314 @@
+import base64
+import binascii
+import json
+import re
+from typing import Any, Dict, List, Union
+from urllib.parse import parse_qs, urlparse
+
+from bs4 import BeautifulSoup
+
+from ..core import _CustomMarkdownify
+from .base import DocumentConverter, DocumentConverterResult
+
+# Optional YouTube transcription support
+try:
+    from youtube_transcript_api import YouTubeTranscriptApi
+
+    IS_YOUTUBE_TRANSCRIPT_CAPABLE = True
+except ModuleNotFoundError:
+    pass
+
+
+class HtmlConverter(DocumentConverter):
+    """Anything with content type text/html"""
+
+    def convert(
+        self, local_path: str, **kwargs: Any
+    ) -> Union[None, DocumentConverterResult]:
+        # Bail if not html
+        extension = kwargs.get("file_extension", "")
+        if extension.lower() not in [".html", ".htm"]:
+            return None
+
+        result = None
+        with open(local_path, "rt", encoding="utf-8") as fh:
+            result = self._convert(fh.read())
+
+        return result
+
+    def _convert(self, html_content: str) -> Union[None, DocumentConverterResult]:
+        """Helper function that converts and HTML string."""
+
+        # Parse the string
+        soup = BeautifulSoup(html_content, "html.parser")
+
+        # Remove javascript and style blocks
+        for script in soup(["script", "style"]):
+            script.extract()
+
+        # Print only the main content
+        body_elm = soup.find("body")
+        webpage_text = ""
+        if body_elm:
+            webpage_text = _CustomMarkdownify().convert_soup(body_elm)
+        else:
+            webpage_text = _CustomMarkdownify().convert_soup(soup)
+
+        assert isinstance(webpage_text, str)
+
+        return DocumentConverterResult(
+            title=None if soup.title is None else soup.title.string,
+            text_content=webpage_text,
+        )
+
+
+class WikipediaConverter(DocumentConverter):
+    """Handle Wikipedia pages separately, focusing only on the main document content."""
+
+    def convert(
+        self, local_path: str, **kwargs: Any
+    ) -> Union[None, DocumentConverterResult]:
+        # Bail if not Wikipedia
+        extension = kwargs.get("file_extension", "")
+        if extension.lower() not in [".html", ".htm"]:
+            return None
+        url = kwargs.get("url", "")
+        if not re.search(r"^https?:\/\/[a-zA-Z]{2,3}\.wikipedia.org\/", url):
+            return None
+
+        # Parse the file
+        soup = None
+        with open(local_path, "rt", encoding="utf-8") as fh:
+            soup = BeautifulSoup(fh.read(), "html.parser")
+
+        # Remove javascript and style blocks
+        for script in soup(["script", "style"]):
+            script.extract()
+
+        # Print only the main content
+        body_elm = soup.find("div", {"id": "mw-content-text"})
+        title_elm = soup.find("span", {"class": "mw-page-title-main"})
+
+        webpage_text = ""
+        main_title = None if soup.title is None else soup.title.string
+
+        if body_elm:
+            # What's the title
+            if title_elm and len(title_elm) > 0:
+                main_title = title_elm.string  # type: ignore
+                assert isinstance(main_title, str)
+
+            # Convert the page
+            webpage_text = f"# {main_title}\n\n" + _CustomMarkdownify().convert_soup(
+                body_elm
+            )
+        else:
+            webpage_text = _CustomMarkdownify().convert_soup(soup)
+
+        return DocumentConverterResult(
+            title=main_title,
+            text_content=webpage_text,
+        )
+
+
+class YouTubeConverter(DocumentConverter):
+    """Handle YouTube specially, focusing on the video title, description, and transcript."""
+
+    def convert(
+        self, local_path: str, **kwargs: Any
+    ) -> Union[None, DocumentConverterResult]:
+        # Bail if not YouTube
+        extension = kwargs.get("file_extension", "")
+        if extension.lower() not in [".html", ".htm"]:
+            return None
+        url = kwargs.get("url", "")
+        if not url.startswith("https://www.youtube.com/watch?"):
+            return None
+
+        # Parse the file
+        soup = None
+        with open(local_path, "rt", encoding="utf-8") as fh:
+            soup = BeautifulSoup(fh.read(), "html.parser")
+
+        # Read the meta tags
+        assert soup.title is not None and soup.title.string is not None
+        metadata: Dict[str, str] = {"title": soup.title.string}
+        for meta in soup(["meta"]):
+            for a in meta.attrs:
+                if a in ["itemprop", "property", "name"]:
+                    metadata[meta[a]] = meta.get("content", "")
+                    break
+
+        # We can also try to read the full description. This is more prone to breaking, since it reaches into the page implementation
+        try:
+            for script in soup(["script"]):
+                content = script.text
+                if "ytInitialData" in content:
+                    lines = re.split(r"\r?\n", content)
+                    obj_start = lines[0].find("{")
+                    obj_end = lines[0].rfind("}")
+                    if obj_start >= 0 and obj_end >= 0:
+                        data = json.loads(lines[0][obj_start : obj_end + 1])
+                        attrdesc = self._findKey(data, "attributedDescriptionBodyText")  # type: ignore
+                        if attrdesc:
+                            metadata["description"] = str(attrdesc["content"])
+                    break
+        except Exception:
+            pass
+
+        # Start preparing the page
+        webpage_text = "# YouTube\n"
+
+        title = self._get(metadata, ["title", "og:title", "name"])  # type: ignore
+        assert isinstance(title, str)
+
+        if title:
+            webpage_text += f"\n## {title}\n"
+
+        stats = ""
+        views = self._get(metadata, ["interactionCount"])  # type: ignore
+        if views:
+            stats += f"- **Views:** {views}\n"
+
+        keywords = self._get(metadata, ["keywords"])  # type: ignore
+        if keywords:
+            stats += f"- **Keywords:** {keywords}\n"
+
+        runtime = self._get(metadata, ["duration"])  # type: ignore
+        if runtime:
+            stats += f"- **Runtime:** {runtime}\n"
+
+        if len(stats) > 0:
+            webpage_text += f"\n### Video Metadata\n{stats}\n"
+
+        description = self._get(metadata, ["description", "og:description"])  # type: ignore
+        if description:
+            webpage_text += f"\n### Description\n{description}\n"
+
+        if IS_YOUTUBE_TRANSCRIPT_CAPABLE:
+            transcript_text = ""
+            parsed_url = urlparse(url)  # type: ignore
+            params = parse_qs(parsed_url.query)  # type: ignore
+            if "v" in params:
+                assert isinstance(params["v"][0], str)
+                video_id = str(params["v"][0])
+                try:
+                    youtube_transcript_languages = kwargs.get(
+                        "youtube_transcript_languages", ("en",)
+                    )
+                    # Must be a single transcript.
+                    transcript = YouTubeTranscriptApi.get_transcript(video_id, languages=youtube_transcript_languages)  # type: ignore
+                    transcript_text = " ".join([part["text"] for part in transcript])  # type: ignore
+                    # Alternative formatting:
+                    # formatter = TextFormatter()
+                    # formatter.format_transcript(transcript)
+                except Exception:
+                    pass
+            if transcript_text:
+                webpage_text += f"\n### Transcript\n{transcript_text}\n"
+
+        title = title if title else soup.title.string
+        assert isinstance(title, str)
+
+        return DocumentConverterResult(
+            title=title,
+            text_content=webpage_text,
+        )
+
+    def _get(
+        self,
+        metadata: Dict[str, str],
+        keys: List[str],
+        default: Union[str, None] = None,
+    ) -> Union[str, None]:
+        for k in keys:
+            if k in metadata:
+                return metadata[k]
+        return default
+
+    def _findKey(self, json: Any, key: str) -> Union[str, None]:  # TODO: Fix json type
+        if isinstance(json, list):
+            for elm in json:
+                ret = self._findKey(elm, key)
+                if ret is not None:
+                    return ret
+        elif isinstance(json, dict):
+            for k in json:
+                if k == key:
+                    return json[k]
+                else:
+                    ret = self._findKey(json[k], key)
+                    if ret is not None:
+                        return ret
+        return None
+
+
+class BingSerpConverter(DocumentConverter):
+    """
+    Handle Bing results pages (only the organic search results).
+    NOTE: It is better to use the Bing API
+    """
+
+    def convert(self, local_path, **kwargs) -> Union[None, DocumentConverterResult]:
+        # Bail if not a Bing SERP
+        extension = kwargs.get("file_extension", "")
+        if extension.lower() not in [".html", ".htm"]:
+            return None
+        url = kwargs.get("url", "")
+        if not re.search(r"^https://www\.bing\.com/search\?q=", url):
+            return None
+
+        # Parse the query parameters
+        parsed_params = parse_qs(urlparse(url).query)
+        query = parsed_params.get("q", [""])[0]
+
+        # Parse the file
+        soup = None
+        with open(local_path, "rt", encoding="utf-8") as fh:
+            soup = BeautifulSoup(fh.read(), "html.parser")
+
+        # Clean up some formatting
+        for tptt in soup.find_all(class_="tptt"):
+            if hasattr(tptt, "string") and tptt.string:
+                tptt.string += " "
+        for slug in soup.find_all(class_="algoSlug_icon"):
+            slug.extract()
+
+        # Parse the algorithmic results
+        _markdownify = _CustomMarkdownify()
+        results = list()
+        for result in soup.find_all(class_="b_algo"):
+            # Rewrite redirect urls
+            for a in result.find_all("a", href=True):
+                parsed_href = urlparse(a["href"])
+                qs = parse_qs(parsed_href.query)
+
+                # The destination is contained in the u parameter,
+                # but appears to be base64 encoded, with some prefix
+                if "u" in qs:
+                    u = (
+                        qs["u"][0][2:].strip() + "=="
+                    )  # Python 3 doesn't care about extra padding
+
+                    try:
+                        # RFC 4648 / Base64URL" variant, which uses "-" and "_"
+                        a["href"] = base64.b64decode(u, altchars="-_").decode("utf-8")
+                    except UnicodeDecodeError:
+                        pass
+                    except binascii.Error:
+                        pass
+
+            # Convert to markdown
+            md_result = _markdownify.convert_soup(result).strip()
+            lines = [line.strip() for line in re.split(r"\n+", md_result)]
+            results.append("\n".join([line for line in lines if len(line) > 0]))
+
+        webpage_text = (
+            f"## A Bing search for '{query}' found the following results:\n\n"
+            + "\n\n".join(results)
+        )
+
+        return DocumentConverterResult(
+            title=None if soup.title is None else soup.title.string,
+            text_content=webpage_text,
+        )

src/markitdown/core.py

@@ -0,0 +1,409 @@
+# type: ignore
+import copy
+import mimetypes
+import os
+import re
+import tempfile
+import traceback
+from pathlib import Path
+from typing import Any, List, Optional, Union
+from urllib.parse import quote, unquote, urlparse, urlunparse
+from warnings import warn
+
+import markdownify
+
+# File-format detection
+import puremagic
+import requests
+
+from .converters.archive import ZipConverter
+from .converters.base import DocumentConverter, DocumentConverterResult
+from .converters.document import DocxConverter, PdfConverter, PptxConverter, XlsxConverter
+from .converters.media import ImageConverter, Mp3Converter, WavConverter
+from .converters.text import IpynbConverter, PlainTextConverter, RSSConverter
+from .converters.web import BingSerpConverter, HtmlConverter, WikipediaConverter, YouTubeConverter
+from .exceptions import FileConversionException, UnsupportedFormatException
+
+
+class _CustomMarkdownify(markdownify.MarkdownConverter):
+    """
+    A custom version of markdownify's MarkdownConverter. Changes include:
+
+    - Altering the default heading style to use '#', '##', etc.
+    - Removing javascript hyperlinks.
+    - Truncating images with large data:uri sources.
+    - Ensuring URIs are properly escaped, and do not conflict with Markdown syntax
+    """
+
+    def __init__(self, **options: Any):
+        options["heading_style"] = options.get("heading_style", markdownify.ATX)
+        # Explicitly cast options to the expected type if necessary
+        super().__init__(**options)
+
+    def convert_hn(self, n: int, el: Any, text: str, convert_as_inline: bool) -> str:
+        """Same as usual, but be sure to start with a new line"""
+        if not convert_as_inline:
+            if not re.search(r"^\n", text):
+                return "\n" + super().convert_hn(n, el, text, convert_as_inline)  # type: ignore
+
+        return super().convert_hn(n, el, text, convert_as_inline)  # type: ignore
+
+    def convert_a(self, el: Any, text: str, convert_as_inline: bool):
+        """Same as usual converter, but removes Javascript links and escapes URIs."""
+        prefix, suffix, text = markdownify.chomp(text)  # type: ignore
+        if not text:
+            return ""
+        href = el.get("href")
+        title = el.get("title")
+
+        # Escape URIs and skip non-http or file schemes
+        if href:
+            try:
+                parsed_url = urlparse(href)  # type: ignore
+                if parsed_url.scheme and parsed_url.scheme.lower() not in ["http", "https", "file"]:  # type: ignore
+                    return "%s%s%s" % (prefix, text, suffix)
+                href = urlunparse(parsed_url._replace(path=quote(unquote(parsed_url.path))))  # type: ignore
+            except ValueError:  # It's not clear if this ever gets thrown
+                return "%s%s%s" % (prefix, text, suffix)
+
+        # For the replacement see #29: text nodes underscores are escaped
+        if (
+            self.options["autolinks"]
+            and text.replace(r"\_", "_") == href
+            and not title
+            and not self.options["default_title"]
+        ):
+            # Shortcut syntax
+            return "<%s>" % href
+        if self.options["default_title"] and not title:
+            title = href
+        title_part = ' "%s"' % title.replace('"', r"\"") if title else ""
+        return (
+            "%s[%s](%s%s)%s" % (prefix, text, href, title_part, suffix)
+            if href
+            else text
+        )
+
+    def convert_img(self, el: Any, text: str, convert_as_inline: bool) -> str:
+        """Same as usual converter, but removes data URIs"""
+
+        alt = el.attrs.get("alt", None) or ""
+        src = el.attrs.get("src", None) or ""
+        title = el.attrs.get("title", None) or ""
+        title_part = ' "%s"' % title.replace('"', r"\"") if title else ""
+        if (
+            convert_as_inline
+            and el.parent.name not in self.options["keep_inline_images_in"]
+        ):
+            return alt
+
+        # Remove dataURIs
+        if src.startswith("data:"):
+            src = src.split(",")[0] + "..."
+
+        return "![%s](%s%s)" % (alt, src, title_part)
+
+    def convert_soup(self, soup: Any) -> str:
+        return super().convert_soup(soup)  # type: ignore
+
+
+class MarkItDown:
+    """(In preview) An extremely simple text-based document reader, suitable for LLM use.
+    This reader will convert common file-types or webpages to Markdown."""
+
+    def __init__(
+        self,
+        requests_session: Optional[requests.Session] = None,
+        llm_client: Optional[Any] = None,
+        llm_model: Optional[str] = None,
+        style_map: Optional[str] = None,
+        # Deprecated
+        mlm_client: Optional[Any] = None,
+        mlm_model: Optional[str] = None,
+    ):
+        if requests_session is None:
+            self._requests_session = requests.Session()
+        else:
+            self._requests_session = requests_session
+
+        # Handle deprecation notices
+        #############################
+        if mlm_client is not None:
+            if llm_client is None:
+                warn(
+                    "'mlm_client' is deprecated, and was renamed 'llm_client'.",
+                    DeprecationWarning,
+                )
+                llm_client = mlm_client
+                mlm_client = None
+            else:
+                raise ValueError(
+                    "'mlm_client' is deprecated, and was renamed 'llm_client'. Do not use both at the same time. Just use 'llm_client' instead."
+                )
+
+        if mlm_model is not None:
+            if llm_model is None:
+                warn(
+                    "'mlm_model' is deprecated, and was renamed 'llm_model'.",
+                    DeprecationWarning,
+                )
+                llm_model = mlm_model
+                mlm_model = None
+            else:
+                raise ValueError(
+                    "'mlm_model' is deprecated, and was renamed 'llm_model'. Do not use both at the same time. Just use 'llm_model' instead."
+                )
+        #############################
+
+        self._llm_client = llm_client
+        self._llm_model = llm_model
+        self._style_map = style_map
+
+        self._page_converters: List[DocumentConverter] = []
+
+        # Register converters for successful browsing operations
+        # Later registrations are tried first / take higher priority than earlier registrations
+        # To this end, the most specific converters should appear below the most generic converters
+        self.register_page_converter(PlainTextConverter())
+        self.register_page_converter(HtmlConverter())
+        self.register_page_converter(RSSConverter())
+        self.register_page_converter(WikipediaConverter())
+        self.register_page_converter(YouTubeConverter())
+        self.register_page_converter(BingSerpConverter())
+        self.register_page_converter(DocxConverter())
+        self.register_page_converter(XlsxConverter())
+        self.register_page_converter(PptxConverter())
+        self.register_page_converter(WavConverter())
+        self.register_page_converter(Mp3Converter())
+        self.register_page_converter(ImageConverter())
+        self.register_page_converter(IpynbConverter())
+        self.register_page_converter(PdfConverter())
+        self.register_page_converter(ZipConverter())
+
+    def convert(
+        self, source: Union[str, requests.Response, Path], **kwargs: Any
+    ) -> DocumentConverterResult:  # TODO: deal with kwargs
+        """
+        Args:
+            - source: can be a string representing a path either as string pathlib path object or url, or a requests.response object
+            - extension: specifies the file extension to use when interpreting the file. If None, infer from source (path, uri, content-type, etc.)
+        """
+
+        # Local path or url
+        if isinstance(source, str):
+            if (
+                source.startswith("http://")
+                or source.startswith("https://")
+                or source.startswith("file://")
+            ):
+                return self.convert_url(source, **kwargs)
+            else:
+                return self.convert_local(source, **kwargs)
+        # Request response
+        elif isinstance(source, requests.Response):
+            return self.convert_response(source, **kwargs)
+        elif isinstance(source, Path):
+            return self.convert_local(source, **kwargs)
+
+    def convert_local(
+        self, path: Union[str, Path], **kwargs: Any
+    ) -> DocumentConverterResult:  # TODO: deal with kwargs
+        if isinstance(path, Path):
+            path = str(path)
+        # Prepare a list of extensions to try (in order of priority)
+        ext = kwargs.get("file_extension")
+        extensions = [ext] if ext is not None else []
+
+        # Get extension alternatives from the path and puremagic
+        base, ext = os.path.splitext(path)
+        self._append_ext(extensions, ext)
+
+        for g in self._guess_ext_magic(path):
+            self._append_ext(extensions, g)
+
+        # Convert
+        return self._convert(path, extensions, **kwargs)
+
+    # TODO what should stream's type be?
+    def convert_stream(
+        self, stream: Any, **kwargs: Any
+    ) -> DocumentConverterResult:  # TODO: deal with kwargs
+        # Prepare a list of extensions to try (in order of priority)
+        ext = kwargs.get("file_extension")
+        extensions = [ext] if ext is not None else []
+
+        # Save the file locally to a temporary file. It will be deleted before this method exits
+        handle, temp_path = tempfile.mkstemp()
+        fh = os.fdopen(handle, "wb")
+        result = None
+        try:
+            # Write to the temporary file
+            content = stream.read()
+            if isinstance(content, str):
+                fh.write(content.encode("utf-8"))
+            else:
+                fh.write(content)
+            fh.close()
+
+            # Use puremagic to check for more extension options
+            for g in self._guess_ext_magic(temp_path):
+                self._append_ext(extensions, g)
+
+            # Convert
+            result = self._convert(temp_path, extensions, **kwargs)
+        # Clean up
+        finally:
+            try:
+                fh.close()
+            except Exception:
+                pass
+            os.unlink(temp_path)
+
+        return result
+
+    def convert_url(
+        self, url: str, **kwargs: Any
+    ) -> DocumentConverterResult:  # TODO: fix kwargs type
+        # Send a HTTP request to the URL
+        response = self._requests_session.get(url, stream=True)
+        response.raise_for_status()
+        return self.convert_response(response, **kwargs)
+
+    def convert_response(
+        self, response: requests.Response, **kwargs: Any
+    ) -> DocumentConverterResult:  # TODO fix kwargs type
+        # Prepare a list of extensions to try (in order of priority)
+        ext = kwargs.get("file_extension")
+        extensions = [ext] if ext is not None else []
+
+        # Guess from the mimetype
+        content_type = response.headers.get("content-type", "").split(";")[0]
+        self._append_ext(extensions, mimetypes.guess_extension(content_type))
+
+        # Read the content disposition if there is one
+        content_disposition = response.headers.get("content-disposition", "")
+        m = re.search(r"filename=([^;]+)", content_disposition)
+        if m:
+            base, ext = os.path.splitext(m.group(1).strip("\"'"))
+            self._append_ext(extensions, ext)
+
+        # Read from the extension from the path
+        base, ext = os.path.splitext(urlparse(response.url).path)
+        self._append_ext(extensions, ext)
+
+        # Save the file locally to a temporary file. It will be deleted before this method exits
+        handle, temp_path = tempfile.mkstemp()
+        fh = os.fdopen(handle, "wb")
+        result = None
+        try:
+            # Download the file
+            for chunk in response.iter_content(chunk_size=512):
+                fh.write(chunk)
+            fh.close()
+
+            # Use puremagic to check for more extension options
+            for g in self._guess_ext_magic(temp_path):
+                self._append_ext(extensions, g)
+
+            # Convert
+            result = self._convert(temp_path, extensions, url=response.url, **kwargs)
+        # Clean up
+        finally:
+            try:
+                fh.close()
+            except Exception:
+                pass
+            os.unlink(temp_path)
+
+        return result
+
+    def _convert(
+        self, local_path: str, extensions: List[Union[str, None]], **kwargs
+    ) -> DocumentConverterResult:
+        error_trace = ""
+        for ext in extensions + [None]:  # Try last with no extension
+            for converter in self._page_converters:
+                _kwargs = copy.deepcopy(kwargs)
+
+                # Overwrite file_extension appropriately
+                if ext is None:
+                    if "file_extension" in _kwargs:
+                        del _kwargs["file_extension"]
+                else:
+                    _kwargs.update({"file_extension": ext})
+
+                # Copy any additional global options
+                if "llm_client" not in _kwargs and self._llm_client is not None:
+                    _kwargs["llm_client"] = self._llm_client
+
+                if "llm_model" not in _kwargs and self._llm_model is not None:
+                    _kwargs["llm_model"] = self._llm_model
+
+                # Add the list of converters for nested processing
+                _kwargs["_parent_converters"] = self._page_converters
+
+                if "style_map" not in _kwargs and self._style_map is not None:
+                    _kwargs["style_map"] = self._style_map
+
+                # If we hit an error log it and keep trying
+                try:
+                    res = converter.convert(local_path, **_kwargs)
+                except Exception:
+                    error_trace = ("\n\n" + traceback.format_exc()).strip()
+
+                if res is not None:
+                    # Normalize the content
+                    res.text_content = "\n".join(
+                        [line.rstrip() for line in re.split(r"\r?\n", res.text_content)]
+                    )
+                    res.text_content = re.sub(r"\n{3,}", "\n\n", res.text_content)
+
+                    # Todo
+                    return res
+
+        # If we got this far without success, report any exceptions
+        if len(error_trace) > 0:
+            raise FileConversionException(
+                f"Could not convert '{local_path}' to Markdown. File type was recognized as {extensions}. While converting the file, the following error was encountered:\n\n{error_trace}"
+            )
+
+        # Nothing can handle it!
+        raise UnsupportedFormatException(
+            f"Could not convert '{local_path}' to Markdown. The formats {extensions} are not supported."
+        )
+
+    def _append_ext(self, extensions, ext):
+        """Append a unique non-None, non-empty extension to a list of extensions."""
+        if ext is None:
+            return
+        ext = ext.strip()
+        if ext == "":
+            return
+        # if ext not in extensions:
+        extensions.append(ext)
+
+    def _guess_ext_magic(self, path):
+        """Use puremagic (a Python implementation of libmagic) to guess a file's extension based on the first few bytes."""
+        # Use puremagic to guess
+        try:
+            guesses = puremagic.magic_file(path)
+            extensions = list()
+            for g in guesses:
+                ext = g.extension.strip()
+                if len(ext) > 0:
+                    if not ext.startswith("."):
+                        ext = "." + ext
+                    if ext not in extensions:
+                        extensions.append(ext)
+            return extensions
+        except FileNotFoundError:
+            pass
+        except IsADirectoryError:
+            pass
+        except PermissionError:
+            pass
+        return []
+
+    def register_page_converter(self, converter: DocumentConverter) -> None:
+        """Register a page text converter."""
+        self._page_converters.insert(0, converter)

src/markitdown/exceptions.py

@@ -0,0 +1,6 @@
+class FileConversionException(BaseException):
+    pass
+
+
+class UnsupportedFormatException(BaseException):
+    pass