🔍 Compare PDF Text differences side‑by‑side
Upload two PDF files and see text differences page by page. Perfect for checking document revisions.
📄 Original PDF
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📄 New PDF
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How to Compare PDF Files – Free & Private Guide
Our PDF Comparison Tool extracts text from two PDFs and highlights differences line by line. It's ideal for reviewing contract revisions, document updates, or any PDF changes. All processing happens locally – your files never leave your device.
🔒 100% Local
No upload – your documents stay private.
📑 Page‑by‑Page Analysis
Compares corresponding pages and shows removed/added text.
📄 Exportable Report
Download comparison results as a text file.
📌 How to use this tool
- Upload two PDFs – Original and new versions.
- Click “Compare PDFs” – Tool extracts and compares text.
- Review differences – Removed (red) and added (green) text per page.
- Download report – Save the comparison for your records.
ℹ️ Note: Comparison is text‑based using a simple diff algorithm. Complex formatting, images, or tables are not compared. For encrypted PDFs, please unlock them first.
❓ Frequently Asked Questions
🔹 Are my PDFs uploaded to a server?
No. Text extraction and diff are done locally using PDF.js and a built‑in diff function. Your files remain private.
🔹 What if the PDFs have different number of pages?
The tool compares up to the minimum page count. Extra pages are reported as added in the longer document.
🔹 How accurate is the text extraction?
PDF.js extracts text as it appears. Complex layouts may produce imperfect ordering, but the diff will still highlight changes.
🔹 Is there a file size limit?
Up to 50 pages per PDF recommended. Very large files may slow down the browser.
🔹 Can I compare password‑protected PDFs?
No – you must unlock them using the correct password before comparing.
🔹 Is this tool free?
Yes, completely free for personal and commercial use, with no watermarks or registration.
⚡ Powered by PDF.js • Client‑side comparison • No tracking • Works offline after first load