PDF tools · Free browser tool
Compare Two PDF Files
Compare two PDFs page by page locally, highlight rendered pixel differences, and review page-count, text, and file-hash changes.
Phone and computer friendly
No document upload
Free to use
Private workspace
Inspect how two document copies differ without uploading either version.
Tab memory only
New output file
Review before sharing
Your file is processed by code already loaded in this tab. Your device, browser, extensions, downloads, and any later sharing remain part of the trust boundary.
Ready. Choose a file to begin.
Choose two PDFs to compare
Inspect how two document copies differ without uploading either version.
Created on this device
Result ready
Open the output and review every important page before replacing or sharing a file.
What this tool does
A focused PDF job, with a visible boundary.
Inspect how two document copies differ without uploading either version.
Pixel-difference overlay
Text, page-count, and SHA-256 summary
Know the limits
Local does not mean unlimited.
Browser processing avoids an upload workflow, but available memory, PDF structure, digital signatures, and the settings you select still matter.
- Rendering differences do not prove why or by whom a document changed.
- Font substitution, antialiasing, or metadata-only changes can affect results.
- This is not cryptographic signature validation or forensic certification.
Four local steps
How to use pdf comparison.
- 01
Choose the earlier and later PDF copies.
- 02
Run the local comparison.
- 03
Review summary differences and each page overlay.
- 04
Use valid digital signatures or trusted originals for authenticity decisions.
Clear answers
PDF comparison questions.
Can this prove a PDF is authentic?
No. It can show differences between two supplied files but cannot establish which one is genuine.
Does it compare metadata?
It reports file hashes, sizes, page counts, and extracted text differences; visible comparison uses rendered pixels.
Are either files uploaded?
No. Both remain on the device during comparison.