Compare Two PDF Files Online Free

Compare two PDF documents side by side and highlight every difference. Instantly spot text changes, additions, deletions, and formatting edits between versions.

How PDF Comparison Works

Upload the original and the revised PDF version. The tool analyses both documents and highlights every difference - added text in green, removed text in red, changed content in yellow - so you can review all edits at a glance.

Word-level change detection - every edit identified precisely
Side-by-side diff view - original and revised shown together
Scanned PDF support - visual pixel-level comparison mode
Comparison report - download a summary of all differences

Frequently Asked Questions

What differences does PDF comparison detect? +

It detects text changes, added or removed content, moved elements, and formatting differences.

Can I compare scanned PDFs? +

Yes, our tool uses visual comparison to detect differences in scanned or image-based PDFs.