Compare Two PDF Files — Find Every Difference
See exactly what changed between two versions of a PDF: word-level text differences and side-by-side page previews. Free, private, in your browser.
Got a revised contract or report back and need to know exactly what changed? Upload both versions and get a page-by-page comparison: removed words in red, added words in green, plus side-by-side previews of every changed page. Everything runs in your browser — neither file is ever uploaded to a server.
Who uses the compare tool
- Reviewing edits to a contract or agreement before signing.
- Comparing two versions of a report, paper, or quote.
- Verifying that the final copy matches the approved draft.
- Spotting pages added or removed between two revisions.
Compare two PDFs in 3 steps
- 1. Upload the original file on the left and the modified file on the right.
- 2. Press the compare button and wait a few seconds.
- 3. Review the difference summary, then walk through the changed pages.
Frequently asked questions
What kinds of differences does it find?
It compares the extracted text of each page at word level — removed, added, and changed words — and flags pages that exist in only one of the files. Every changed page also gets a side-by-side visual preview.
Does it work with scanned PDFs?
The comparison relies on the text inside the file. If your PDF is a scan with no text layer, run it through the OCR tool first, then compare the output.
Are my files uploaded?
No — the comparison happens locally in your browser with JavaScript; neither file leaves your device.
Is there a page limit?
No hard limit, but very large files take longer since all the processing happens on your own machine.
Read the full step-by-step guide