Can this prove a PDF is authentic?
No. It can show differences between two supplied files but cannot establish which one is genuine.
- Side-by-side page review
Guide
Inspect how two document copies differ without uploading either version.
Compare two PDFs page by page locally, highlight rendered pixel differences, and review page-count, text, and file-hash changes.
Clear answers
Inspect how two document copies differ without uploading either version.
Compare two PDFs page by page locally, highlight rendered pixel differences, and review page-count, text, and file-hash changes.
Does it compare metadata?
It reports file hashes, sizes, page counts, and extracted text differences; visible comparison uses rendered pixels.
- Pixel-difference overlay
Are either files uploaded?
No. Both remain on the device during comparison.
- Text, page-count, and SHA-256 summary
A local check
Inspect how two document copies differ without uploading either version.
Compare two PDFs page by page locally, highlight rendered pixel differences, and review page-count, text, and file-hash changes.
Selected file
Choose the earlier and later PDF copies.
Choose the earlier and later PDF copies.
Review before sharing
Pixel-difference overlay
Run the local comparison.
Local verification
Review summary differences and each page overlay.
Review summary differences and each page overlay.
Use valid digital signatures or trusted originals for authenticity decisions.
Four local steps
Does it compare metadata?
- 01
Side-by-side page review
Choose the earlier and later PDF copies.
- 02
Pixel-difference overlay
Run the local comparison.
- 03
Text, page-count, and SHA-256 summary
Review summary differences and each page overlay.
- 04
Side-by-side page review
Use valid digital signatures or trusted originals for authenticity decisions.
Browser privacy
Compare Two PDF Files
Side-by-side page review
No. It can show differences between two supplied files but cannot establish which one is genuine.
Pixel-difference overlay
It reports file hashes, sizes, page counts, and extracted text differences; visible comparison uses rendered pixels.
Text, page-count, and SHA-256 summary
No. Both remain on the device during comparison.
Clear answers
Are either files uploaded?
No. Both remain on the device during comparison.
- 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.
Private workspace
Compare Two PDF Files
Inspect how two document copies differ without uploading either version.