PDF Visual and Text Compare
Find meaningful differences between two versions of a document.
or drop PDF here ·
Files stay on this device. Nothing is uploaded.PDF
- 1
Choose PDF
Pick PDF from your device or drop them on the page. Type is checked from the file’s bytes, not its name.
- 2
Set options
Pick visual, text, or both, plus a pixel threshold.
- 3
Save PDF
Processing happens in this tab. You download a new copy; your originals are never changed.
How it works
- Choose two unencrypted PDFs.
- Pick visual, text, or both, plus a pixel threshold.
- Process for a JSON report. Diff images are optional.
Files stay in this tab. No upload.
Alignment is by page index. Byte inequality is not treated as a visual diff.
Supported inputs and outputs
Two PDFs in. JSON report out; optional PNG diffs.
Example
Identical files report zero changes. An added page is a 100% visual change.
Questions and answers
Is a checksum a visual diff?
No. Visual mode compares rendered pixels above the threshold.
Related: PDF to ImagesPDF Text Extractor