very nice
good ho gye g maza hi a gye
October 2026
100% In-Browser • Your Files Are Never Uploaded
Compare Two PDFs
Find out exactly what changed between two versions of a document: words added and removed, or a visual overlay that highlights every changed area.
Step 1
Choose two PDFs
Original
Choose the original PDF
Changed
Choose the changed PDF
Step 2
Compare
Comparison
Text differences
Choose both PDFs and click Compare Text to see what changed.
Two files, no upload
Both versions are read and compared in your browser.
Word-level changes
Added and removed words are marked, with a jump to each change.
Visual differences
Highlights changed areas on scans, images and layouts too.
See every change between two versions
A 40-page contract comes back with two clauses quietly reworded, and nobody tells you which. Upload the old and the new version and the text comparison lines up the words of the whole document: removed words are marked red, added words green, and you can jump from one change to the next.
Some changes aren't in the text: a new logo, a moved table, a different signature or a replaced scan. The visual comparison renders both versions and highlights every area where the pages look different, with a slider to fade between them. Find All Changed Pages scans the whole document and lists the pages that differ.
Both files are read in your browser, which matters for confidential documents like contracts and financial statements. The text comparison can be downloaded as an HTML report to keep or share.
How to use it
- 1Upload the original PDF and the changed PDF.
- 2Choose Text or Visual comparison.
- 3Step through the changes with the previous and next buttons.
- 4Download the report if you want to keep it.
When to compare PDFs
- Checking what the other side changed in a contract before you sign.
- Reviewing a new version of a policy, report or manual.
- Making sure a reprinted brochure or invoice matches the approved proof.
- Spotting which pages of a scanned document were replaced.
- Confirming that only the agreed corrections were made between two drafts of a document.
Text or visual: which to use
Text comparison works on the words in the PDF. It compares the whole document at once, so a paragraph that moved to another page is still matched, and it shows counts of added and removed words. Very different files are compared page by page instead.
Visual comparison works on what the pages look like. Use it for scans, images, logos, layout and colour changes, or anything without selectable text. Pages that exist in only one of the files are flagged.
Limits and accuracy
- Scanned PDFs have no text, so only the visual comparison works for them.
- In visual mode, content that shifted (for example after re-flowing text or a new scan) shows as changed.
- Each PDF can be up to 300 MB; big documents take longer to render in visual mode.
- Password-protected files have to go through Unlock PDF first.
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Frequently Asked Questions
Is my file uploaded to a server?
No. The tool runs entirely in your browser tab using JavaScript. Your files never leave your device, and closing the tab discards them.
Can it compare scanned PDFs?
Scanned pages have no text, so use the Visual comparison: it compares how the pages look and highlights areas that differ. Small shifts from rescanning can show up as differences too.
What if the two PDFs have different page counts?
The text comparison compares the whole text across pages, so content that moved to another page is still matched. The visual comparison pairs pages by number and tells you which pages exist in only one file.
Can I save the comparison?
Yes. In text mode, download the report as an HTML file that opens in any browser, with removed and added words marked in red and green.
Does it compare images and formatting?
The text comparison looks at words only. Use the visual comparison to catch changed images, logos, colours, layout or formatting.
Is there a size limit?
Each PDF can be up to 300 MB. Text comparison is quick even on long documents; visual mode renders every page, so a 200-page file takes noticeably longer.
Why are some identical words marked as changed?
Usually because the text is stored differently, for example a line break or hyphen in a new place, or a ligature such as “fi” saved as one character. Read the marked passage in context; if it reads the same, it hasn't really changed.