diff --git a/d2cli/main.go b/d2cli/main.go
index 93a103db9..2fed039ee 100644
--- a/d2cli/main.go
+++ b/d2cli/main.go
@@ -459,7 +459,7 @@ func compile(ctx context.Context, ms *xmain.State, plugins []d2plugin.Plugin, fs
 	if os.Getenv("D2_LSP_MODE") == "1" {
 		// only the parse result is needed if running d2 for lsp,
 		// if this, "fails", the AST is still valid and can be sent
-		// to vscode extention
+		// to vscode extension
 		ast, err := d2lib.Parse(ctx, string(input), opts)
 
 		type LspOutputData struct {
diff --git a/docs/CONTRIBUTING.md b/docs/CONTRIBUTING.md
index f1be97999..d931a90df 100644
--- a/docs/CONTRIBUTING.md
+++ b/docs/CONTRIBUTING.md
@@ -100,7 +100,7 @@ running:
 ./ci/e2ereport.sh -delta
 ```
 
-This gives me a nice HMTL output of what the test expected vs what it got (this was a PR
+This gives me a nice HTML output of what the test expected vs what it got (this was a PR
 fixing multi-byte character labels):
 
 ![screencapture-file-Users-alexanderwang-dev-alixander-d2-e2etests-out-e2e-report-html-2023-02-14-10_15_07](https://user-images.githubusercontent.com/3120367/218822836-bcc517f2-ae3e-4e0d-83f6-2cbaa2fd9275.png)
diff --git a/lib/urlenc/urlenc_test.go b/lib/urlenc/urlenc_test.go
index 5b492938f..787f1b5fd 100644
--- a/lib/urlenc/urlenc_test.go
+++ b/lib/urlenc/urlenc_test.go
@@ -23,7 +23,7 @@ I just forgot my whole philosophy of life!!!: {
 }
 
 // TestChanges makes it explicit in PRs when encoding changes
-// Something we might want to know for playground compatability
+// Something we might want to know for playground compatibility
 func TestChanges(t *testing.T) {
 	// Choose something with many keywords and varied text
 	const script = `timeline mixer: "" {