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Ilmainen PDF Compare

Compare two PDFs page by page — side by side, as an onion-skin overlay, or with changed areas highlighted in red. Both files stay in your browser.

Ei tiedostokokorajoitustaTiedostot pysyvät yksityisinäEi kirjautumista tarvitaIlmainen ikuisesti

Original (A)

Pudota tiedostot tähän tai napsauta selataksesi

PDF ei tiedostokokorajoitusta

Selaa tiedostoja

Changed (B)

Pudota tiedostot tähän tai napsauta selataksesi

PDF ei tiedostokokorajoitusta

Selaa tiedostoja

Tiedostosi eivät koskaan poistu laitteeltasi. Kaikki käsittely tapahtuu paikallisesti selaimessasi.

Drop two PDFs to compare them page by page — side by side, as an onion-skin overlay, or with changed areas highlighted. Both files stay in your browser.

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Compare Two Contract Versions Review Document Revisions Compare Invoices or Statements Compare Design Proofs Compare Paper or Thesis Drafts

Miten se toimii

Tools like Draftable and Adobe charge for good PDF comparison, and PDF24 uploads your files. This compares two PDFs visually in your browser — neither file leaves your device.

1
You drop in two PDFs
An "original" (A) and a "changed" (B). Both are rendered locally with pdf.js.
2
Each page is rendered to an image
The matching page from each document is drawn to a canvas at the same scale, in your browser.
3
You choose how to compare
Side by side, an onion-skin overlay with an opacity slider, or a pixel-difference view that highlights changed areas in red and reports the percentage changed.
4
You page through the documents
Step through every page; pages that exist in only one file are flagged.

Contracts and drafts are sensitive, and most comparison tools upload them. Here everything is rendered and compared on your device — ideal for reviewing revised agreements, statements, and documents privately.