Compare Documents
Find every difference between two PDFs, Word files, or text documents. Changes are highlighted right in your browser. No upload required.
Both files stay on your device. No uploads. No tracking. No cookies.
Drop a file here
or click to browse. PDF, Word, text, or Markdown.
Drop a file here
or click to browse. PDF, Word, text, or Markdown.
How it works
Compare Documents reads both files in your browser, pulls out the text, and runs a word-by-word comparison. PDFs and Word files are parsed locally with the same engines that power our other tools, so nothing is sent anywhere. The result is a single marked-up view: removed text in red, added text in green.
When to use this
It's the right tool when you need to check what changed between two contract drafts before you sign, confirm that an edit a client sent back matches what you asked for, or see the difference between two versions of a policy without reading both line by line. Especially when the document is sensitive and you don't want a third-party server reading it.
Why this tool is different
A strict Content Security Policy on this page blocks outbound network requests. No analytics, no cookies, no upload. Both files stay on your device. Read why we built free tools that never touch your files.
Frequently asked questions
What file types can I compare?
You can compare PDFs, Word documents (.docx), plain text (.txt), and Markdown. You can also compare across formats, for example a PDF against a Word version of the same document.
Does Surmado see my documents?
No. The comparison runs entirely on your device. These files are never uploaded to our servers.
Is this document compare tool free?
Yes. There's no signup, no usage cap, and no premium tier.
How are the differences shown?
Removed text is shown in red with a strikethrough, and added text is shown in green. You also get a count of how many words were added and removed.
Can it compare scanned PDFs?
It compares the text layer of a PDF. A scanned PDF that is just an image of the page has no text layer to read, so run it through OCR first, then compare.
How is this different from tools like Draftable, Diffchecker, or iLovePDF?
Like Draftable, Diffchecker, and iLovePDF, Surmado compares two documents and highlights what changed. The difference is that Surmado runs the comparison inside your browser, so your files never leave your device, it handles PDF, Word, and plain text in one place, and it's free with no signup.
Built by Surmado
AI for small business. If you like how we think, check out what we're building.
Learn what we do →