diff --git a/src/markitdown/_markitdown.py b/src/markitdown/_markitdown.py
index 96997cf..daf1127 100644
--- a/src/markitdown/_markitdown.py
+++ b/src/markitdown/_markitdown.py
@@ -80,9 +80,15 @@ class _CustomMarkdownify(markdownify.MarkdownConverter):
         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
+                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
+                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)
 
@@ -504,6 +510,11 @@ class XlsxConverter(HtmlConverter):
     Converts XLSX files to Markdown, with each sheet presented as a separate Markdown table.
     """
 
+    def _clean_colname(self, colname: str | Any) -> str | Any:
+        if isinstance(colname, str) and colname.startswith("Unnamed:"):
+            return ""
+        return colname
+
     def convert(self, local_path, **kwargs) -> Union[None, DocumentConverterResult]:
         # Bail if not a XLSX
         extension = kwargs.get("file_extension", "")
@@ -514,7 +525,13 @@ class XlsxConverter(HtmlConverter):
         md_content = ""
         for s in sheets:
             md_content += f"## {s}\n"
-            html_content = sheets[s].to_html(index=False)
+            sheet = sheets[s]
+            sheet.columns = list(map(self._clean_colname, sheet.columns))
+            html_content = (
+                sheet.dropna(how="all", axis=1)
+                .dropna(how="all", axis=0)
+                .to_html(index=False, na_rep="")
+            )
             md_content += self._convert(html_content).text_content.strip() + "\n\n"
 
         return DocumentConverterResult(
@@ -629,7 +646,9 @@ class MediaConverter(DocumentConverter):
         else:
             try:
                 result = subprocess.run(
-                    [exiftool, "-json", local_path], capture_output=True, text=True
+                    [exiftool, "-json", local_path],
+                    capture_output=True,
+                    text=True,
                 ).stdout
                 return json.loads(result)[0]
             except Exception:
diff --git a/tests/test_files/test.xlsx b/tests/test_files/test.xlsx
index 3a41e17..56ec497 100755
Binary files a/tests/test_files/test.xlsx and b/tests/test_files/test.xlsx differ
diff --git a/tests/test_markitdown.py b/tests/test_markitdown.py
index 94fd886..edbeefe 100644
--- a/tests/test_markitdown.py
+++ b/tests/test_markitdown.py
@@ -120,9 +120,12 @@ def test_markitdown_local() -> None:
 
     # Test XLSX processing
     result = markitdown.convert(os.path.join(TEST_FILES_DIR, "test.xlsx"))
+    # Check assertions
     for test_string in XLSX_TEST_STRINGS:
         text_content = result.text_content.replace("\\", "")
         assert test_string in text_content
+    # Check negations
+    assert "Unnamed:" not in text_content
 
     # Test DOCX processing
     result = markitdown.convert(os.path.join(TEST_FILES_DIR, "test.docx"))