How to compare two PDFs
- Choose exactly one original PDF and one revised PDF.
- Review page-count and size mismatches before comparing equivalent pages.
- Use changed-page navigation and the most useful comparison mode for each difference.
Compare PDF Files
Compare two PDFs for visual, text, page-count, and page-size differences directly in your browser.
PDF bytes, extracted text, comparison pixels, and Markdown stay in this browser tab. Links and PDF actions are never opened or executed.
Original · PDF A
Add a PDF sourceOne PDF · 100 MB and 300 page safety limitsChoose from your device or drag and drop a file here.
Revised · PDF B
Add a PDF sourceOne PDF · 100 MB and 300 page safety limitsChoose from your device or drag and drop a file here.
Review an original and revised PDF with synchronized page navigation, searchable-text changes, dimension checks, overlays, and tolerance-aware pixel differences.
How OpenFileTools processes it
Local processing, explicit choices.
PDF.js holds one managed session per document, caches reconstructed searchable text in memory, and renders only inspected pages for visual comparison. No document data is uploaded.
Questions, answered.
Are the PDFs uploaded?
No. Both files and all comparison data stay in this browser tab.
Does identical mean legally equivalent?
No. The tool reports supported visual, text, and structural comparisons and is not a forensic guarantee.
Can it compare scans?
It can compare their rendered pixels, but text comparison requires an existing searchable text layer.