How does PDF comparison work?

Upload two PDF files and EdgeDocs highlights the visual differences between them. Added, removed, or changed content is marked so you can see exactly what's different between versions.

Does it compare text or visual layout?

EdgeDocs performs a visual comparison — it renders both pages and highlights pixel-level differences. This catches text changes, image modifications, layout shifts, and formatting differences.

Can I compare contracts to spot changes?

Yes. This is one of the most common use cases — comparing contract versions to verify that only the agreed-upon changes were made, and nothing else was modified.

Is there a page limit for comparison?

The tool compares documents page by page. Longer documents take more time to process in the browser but there is no hard page limit beyond the file size limits (25MB free, 200MB Pro).

Compare PDF

Q: Do both files get uploaded to a server?

No. Both PDFs are loaded and compared entirely in your browser. Neither document leaves your device at any point during the comparison.

Upload two PDFs to find visual differences. Flagship privacy-first comparison tool.

Original Document (A)

Drop or click to upload PDF A

Modified Document (B)

Drop or click to upload PDF B

Comparison works on text-selectable PDFs only. Scanned or image-based documents have no extractable text and will show no differences even if content differs visually.

🔒 Your files never leave your browser. All processing is done locally.

No-Upload Processing

Network requests during processing: 0

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Compare PDF Versions Without Uploading Either File

When a contract comes back with "minor changes" or a report has been "updated," you need to know exactly what changed. EdgeDocs compares two PDFs side by side entirely in your browser — neither document leaves your device.