PVPDF Vision
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Compare PDF

Compare two PDF files

See what changed between two versions — word by word, page by page.

Original
Drop a PDF, or click
Revised version
Drop a PDF, or click

Compares the text. Layout, images and formatting changes are not detected.

Compare two PDF files online, free

PDF Vision compares the text of two PDFs and shows every difference: words removed in red, words added in green, each change labelled with its page in both versions. It is the fastest way to check what a counterparty changed in the contract they sent back, what moved between two drafts of a report, or whether the signed copy matches the one you approved. The comparison runs entirely in your browser — neither document is uploaded — and uses the same method as professional diff tools: the smallest set of changes that turns one text into the other, so a single edited figure shows up as one changed word, not a rewritten paragraph. Scanned PDFs have no text to compare: run them through OCR first. One free comparison a day with no account.

How to compare two PDF files

  1. Drop both PDFs

    The original on the left, the revised version on the right. Nothing is uploaded.

  2. Compare

    The text of both documents is read and compared line by line, then word by word.

  3. Review the changes

    Removed words in red, added words in green, with the page of each change.

Why use it

Catch the quiet edit

A payment term moved from 30 to 45 days in a returned contract jumps out instead of hiding in page 7.

Word by word

One changed figure reads as one changed word — not as a paragraph deleted and rewritten.

Confidential by design

Contracts and drafts never leave your device: the comparison runs in your browser.

Frequently asked questions

What does the comparison detect?
Changes to the text: words added, removed or replaced, with the page where each change sits in both versions.
Does it detect layout or image changes?
No. It compares the text only. A moved image, a new colour or a different font is not reported.
Are my documents uploaded?
No. Both PDFs are read and compared in your browser.
Can I compare scanned documents?
Not directly: a scan is an image with no text. Run both through OCR first, then compare the results.
Is there a size limit?
Up to 300 pages per document, since the work happens in your browser’s memory.
Do I need an account?
One free comparison a day without an account.

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