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Compare PDF

Compare PDFs

Spot what changed between two versions of a document. Drop both files and FernPDF highlights the pages that differ, all compared privately in your browser.

Original (A)
Drop a PDF
No upload · processed locally · auto-deleted
Revised (B)
Drop a PDF
No upload · processed locally · auto-deleted
A · Keep going

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B · How it works

How to compare two PDFs without uploading

Drop two versions of a document and FernPDF renders both in your browser, then flags every page that changed, plus any pages added or removed. A fast way to review edits between drafts.

Because both files are compared locally, confidential contracts and revisions are never uploaded to a server.

C · FAQ

Both PDFs are rendered page by page in your browser and compared visually. Pages that differ are flagged, along with pages added or removed between the two versions.

The look. It detects visual differences on each page, which catches edits, moved content, and formatting changes, not just text.

No. Both documents are rendered and compared entirely in your browser. Nothing is sent to a server.