Synchronized navigation
Move through both documents together so the same page is always visible in the comparison.
Compare PDFs Online — Synchronized Visual Diff
Compare two PDFs with synchronized page navigation, side-by-side, overlay, or blink views, plus a page-level change report
Compare PDF content
Compare normalized native text page by page. No AI model is used.Document A
Original PDF
Document B
Revised PDF
Deterministic local comparisonThe report compares extractable text in matching page positions. Scanned-image differences require OCR first.
Three visual modes
Use side-by-side, overlay, or blink views to spot geometry and visual changes quickly.
Deterministic report
Export a JSON report listing changed pages and normalized native-text differences without AI interpretation.
Local comparison
Both PDFs are inspected in this browser and remain unchanged.
How to use Compare PDFs
Choose your files
Select one or more supported files from your device. The source remains under your control.
Configure compare pdfs
Review the available settings and preview the intended result before processing.
Process in your browser
The operation runs in this browser without an implicit file upload.
Review and download
Inspect the result, then save the new file. Your original source is left unchanged.
Compare PDFs questions
Does comparison detect visual changes?
The synchronized previews help inspect visual changes; the exported report is deterministic and currently compares normalized native text page by page.
Can I compare PDFs page by page?
Yes. Add exactly two PDFs, navigate their synchronized pages, and choose side-by-side, overlay, or blink view before exporting the change report.
Fingerprint PDF
Generate a local SHA-256 byte fingerprint or an experimental canonical-document fingerprint for verification.
Chat with PDF
Retrieve page-cited supporting passages for a question without sending the PDF or query to a provider.
Repair PDF
Use MuPDF recovery and a clean full rewrite, then reopen the output before offering it for download.