Compare two PDFs
Spot text differences between two PDFs.
Check what changed between two versions of a contract, quote or specification. Additions and deletions are highlighted side by side, with an HTML report to keep.
How to compare two pdfs in 3 steps
Add your file
Click “Select” or drag and drop the file. It stays on your device.
Compare two PDFs
Add the original, then the modified version.
Download the result
Your file is ready in seconds, with no watermark and no sign-up.
Why use Compare PDF on PDF Atlas?
100% private
Your documents are processed in your browser and never uploaded.
Free & unlimited
No account, no watermark, no daily limit.
Fast
No upload time: results are instant.
Works everywhere
Computer, tablet or phone, on every system.
Frequently asked questions
Are visual differences detected?
The tool compares text (words or lines). Purely graphical changes are not flagged.
What about scanned PDFs?
Run OCR PDF on both files first so their text can be compared.
Is Compare PDF free?
Yes, the Compare PDF tool on PDF Atlas is completely free, with no sign-up, no limits and no watermark.
Are my files safe?
Yes. Processing happens locally in your browser: your files are neither uploaded nor stored on a server.