What types of differences are detected?

Text changes, added/removed pages, and image replacements.

No. Everything runs locally in your browser.

What is the file size limit?

Process files up to the browser memory limit.

Only if they have been OCR-processed first.

Yes — each page pair is compared and differences are shown inline.

Compare two PDF versions and highlight all text and layout differences. The safest way to process sensitive data with zero-up

Your files never leave your device. Processed locally. 100% private.

Unlocking Tool Engine...

Complete your task perfectly in just three straightforward steps.

Upload the original and the revised PDF side by side.

Differences are highlighted: additions in green, deletions in red.

Download a diff report or an annotated PDF with changes marked.

Everything you need to know about the PDF Compare.

Continue working with our suite of free data utilities.

Compare two CSV files and highlight added, removed, and changed rows. Securely process files in your browser memory with zero

Compare two versions of any text file (JSON, XML, Code)

Find and remove duplicate rows from CSV files based on selected key columns. The safest way to process sensitive data with ze