Drop two pdfs above to compare them
Compare Two PDF Files — See Every Text Change
Upload two PDFs and see every text change highlighted inline, page by page. A private PDF comparison tool that extracts and diffs text entirely in your browser — nothing is uploaded — so contracts and confidential PDFs never leave your device. Included in Pro — €9.99/mo.
How to compare pdfs
- Upload the first PDF.
- Upload the second PDF.
- Text is extracted client-side and every change is shown inline — no server involved.
Key features
- PDF text extracted client-side using JavaScript — no server upload
- Page-by-page comparison with inline change highlighting
- Page images tab: a pixel-level visual diff of each rendered page, catching stamps, signatures, and layout changes the text diff can't see
- Works with any PDF: scanned, form-based, or native text
- Unlocks with Pro — €9.99/mo
Common uses
- Compare two PDF versions of a contract when the other party sends PDFs instead of Word files
- Verify the executed PDF matches the final negotiated version word for word
- Spot redlines a counterparty made in a PDF when Track Changes was not used
Frequently asked questions
How do I compare two PDF files for differences?
Upload both PDFs and Compare Files extracts the text client-side and highlights every added, deleted, and changed word inline. There is no upload step and no conversion — it reads native-text PDFs directly in the browser.
Can I compare a PDF against a Word document?
Yes. If the other side sent a PDF instead of a DOCX, use the Documents comparison, which accepts both formats side by side so you can diff a PDF against a Word version without converting anything.
Can I compare PDFs visually, not just by text?
Yes. Switch to the Page images tab and Compare Files renders each page and highlights pixel-level differences, so you can spot a swapped signature, an added stamp, or a reformatted page even when the extracted text is identical — useful for scanned or image-based PDFs where text alone is not enough.
Are my PDFs uploaded anywhere?
No. All text extraction and comparison happens inside your browser. Your PDFs never leave your device, so confidential and privileged files stay private.
No AI means no hallucinations
Compare Files uses a deterministic, logic-based engine — not a language model. It reports every change that is actually in your files, and never invents one.
Your files never leave your device. Everything runs in your browser — no uploads, nothing stored.
No AI, so no hallucinations. A deterministic engine reports every real change and never invents one.
No upload, no server wait. Comparisons run locally and keep working offline once the page has loaded.