Does Compare PDF show text changes or pixel diffs?

Both. The 'Text' view highlights insertions and deletions; the 'Visual' view overlays the two pages and colors any pixel differences.

Can I compare two scanned PDFs?

Yes — PDFWix runs OCR on the fly when no embedded text is found, then performs a textual diff.

My Compare PDF job is stuck on "processing".

Refresh the page and try again. Browser-side processing depends on your device's CPU and RAM, so closing other tabs usually helps.

The downloaded file looks different from the preview.

Clear your browser cache and re-run the job. Outdated cached fonts can occasionally cause rendering glitches. If the issue persists, email us a sample to help@pdfwix.com.

Can I undo a Compare PDF operation?

Your original file is never modified — PDFWix always produces a new file. Just discard the new version and start again with the original.

How to Compare PDF: A Step-by-Step Guide

Spot differences between two PDF versions with side-by-side text and visual diff.