Compare two PDFs
Spot every added, removed or changed sentence between two versions — with page previews side by side.
Drop your PDF files here or click to browse
Stays on your device — nothing is uploaded
Select 2 or more files
How do I compare two PDFs for free?
Open PDFkitt's Compare PDFs tool (pdfkitt.com/compare-pdf/): choose the two PDFs, pick the granularity, compare, then review. It is free, needs no account and adds no watermark, and it runs entirely in your browser — the file is never uploaded to a server.
- Price
- Free — no trial, no paid tier, no watermark
- Account
- Not needed
- File upload
- None — processed on your device, in the browser
- Input
- PDF files (several at once)
- Limits
- No daily quota and no file-count limit
- Works on
- Windows, macOS, Linux, iPhone, iPad and Android, in any modern browser
Updated · by the PDFkitt team
Which clauses changed between the draft you sent and the version that came back? Drop the two files and the tool compares their text page by page, highlighting insertions in green and deletions in red, and can show the pages side by side so layout changes are obvious too.
The comparison runs in your browser, which makes it safe for contracts and confidential drafts. Word-level comparison catches single-character edits; sentence level is easier to read.
How to compare two PDFs
- Choose the two PDFs The original first, the new version second.
- Pick the granularity Sentences, lines or words.
- Compare On your device.
- Review Differences per page; download the report as HTML.
Why use PDFkitt to compare PDFs?
The file is processed inside your browser tab. Disconnect from the internet after the page loads and it still works.
No signup, no email, no daily quota, no page limit, no watermark. Use it as often as you like.
Phone, tablet or desktop, in Chrome, Safari, Edge and Firefox. Nothing to install.
Frequently asked questions
Can it compare scanned PDFs?
Run OCR PDF on both first so they have text.
Does it detect moved paragraphs?
Moved text shows as removed in one place and added in another.
Is my file uploaded?
No. Everything runs in your browser.