Compare PDF

See what text changed between two PDF versions.

Processed locally in your browser using PDF.js and pdf-lib. Your file is never uploaded.

Original

Drop the original PDF

Up to 50 MB

Revised

Drop the revised PDF

Up to 50 MB

Overview

Extracts the text from two PDFs and shows a line-by-line diff of what was added and removed. Works on the text layer — it does not compare visual layout or images.

How to use it

1Upload the original PDF and the revised PDF.
2Review the added / removed lines side by side.

How it works

Text is pulled from each file with PDF.js, then compared with a line-level diff — all in your browser.

Tips

Scanned PDFs with no text layer won't produce a useful comparison; run OCR first.

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