How does PDF comparison work?

The tool extracts text from both PDFs using PDF.js and performs a line-by-line diff. It shows which text phrases were added (in green) and which were removed (in red) on each page.

Can it compare scanned PDFs?

No. Scanned PDFs contain images of text, not actual text data. Only text-based PDFs (created digitally) can be compared with this tool.

Does it compare visual layout and formatting?

No — this tool compares text content only. Visual differences like font changes, images, or layout shifts are not detected. For visual comparison, use the Image Comparison Tool.

Is there a page limit?

No hard limit. Very large PDFs may take a moment to process in the browser.

Are my files uploaded to a server?

No. Both PDFs are processed entirely in your browser using PDF.js. Your documents never leave your device.

Does it compare formatting and images?

No — text content only. Visual differences like layout, fonts, and images are not detected.

Is my PDF uploaded to a server?

No. Both PDFs are processed locally in your browser.

Compare PDF Files — Find Differences Between Two PDFs Free

Compare two PDF documents and highlight text differences page by page. Added content shown in green, removed in red. No upload required.

Original PDF

Click to upload

Modified PDF

Click to upload

100% Private

No Upload

Instant

What is Compare PDF Files — Find Differences Between Two PDFs Free?

A PDF comparison tool finds the text differences between two PDF documents. It extracts the text from each page of both PDFs and performs a line-by-line diff, highlighting content that was added (shown in green) or removed (shown in red). Our tool uses PDF.js running in your browser.

How to Use Compare PDF Files — Find Differences Between Two PDFs Free

1Upload the original PDF.
2Upload the modified PDF.
3Click Compare PDFs.
4Review the page-by-page diff results.

Key Features

Page-by-page text comparison
Added content highlighted green
Removed content highlighted red
Summary of changed pages
Runs in your browser with PDF.js
No upload required

Benefits

Find changes in contract revisions
Verify document versions
Check if a PDF was altered
Compare report versions

Why Use Irreva for Compare PDF Files — Find Differences Between Two PDFs Free?

Find changes in contract revisions

Verify document versions

Check if a PDF was altered

Runs 100% in your browser — files never leave your device.

No account, no sign-up, no subscription — free forever.

Works on any device: desktop, tablet, or mobile.

Frequently Asked Questions

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