Compare HTML Files Online
Compare HTML templates. See every tag and content change.
Comparison content is processed in this browser and is not uploaded to DiffPeek.
Compare two HTML files line by line
Paste or open two HTML documents to find changed elements, attributes, template text, and formatting. Split view keeps both versions aligned, while unified view produces a compact review.
DiffPeek compares source markup; it does not render or execute the HTML. Ignore whitespace for formatting-only edits, navigate each change, and select a changed row to edit or merge it in either direction. Undo, redo, and local unified-diff export are available.
Try a source-markup change
Open the filled HTML example to review a heading and content-list update. The result is line/character based: semantically equivalent attribute reordering, optional tags, entity spellings, or whitespace can still appear different.
No DOM is constructed for comparison, scripts are not executed, and the browser-rendered appearance is not evaluated. Use Image Compare for visual screenshots.
Compare XML markup with XML Diff, review scripts with Code Compare, or inspect all changed project files with the Folder Diff Checker.