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Compare Two PDFs — Visual Diff, Free

Spot every difference between two PDFs with PdfWord's free visual compare — differences glow red, identical content fades. The only free PDF diff tool that runs 100% in your browser.

Unlike most online converters, PdfWord processes your files entirely in your browser — nothing is ever uploaded to a server. There are no accounts, no daily limits, no watermarks, and every tool is free forever.

PDF Compare — Visual Diff

Upload two PDFs. Every page pair is rendered and pixel-compared — differences highlighted in red.

Drop PDF A (original) hereor click to browse
Drop PDF B (modified) hereor click to browse

How to compare PDFs: upload the original and the revised PDF. PdfWord renders every page pair and highlights pixel differences in red, with a similarity score per page. Perfect for contracts, invoices, and revised documents.

How to compare two PDFs

  1. Upload the original PDF (A) and the revised PDF (B)
  2. Click Compare PDFs
  3. See every difference highlighted in red, with similarity scores
  4. Download the diff report as PDF

Frequently asked questions

What counts as a difference?

Any visible pixel change — edited text, moved images, added stamps or signatures. Tiny anti-aliasing noise is ignored.

Is it free?

Yes — the only free visual PDF diff that runs entirely in your browser. No signup, no watermark.

Are my documents uploaded anywhere?

No. Both PDFs stay on your device — ideal for confidential contracts.

Try PDF Compare Now — Free →