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Libre 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.

Sen límite de tamaño de ficheiroOs ficheiros permanecen privadosNon é necesario iniciar sesiónLibre para sempre

Original (A)

Solta ficheiros aquí ou fai clic para buscar

PDF sen límite de tamaño de ficheiro

Explorar ficheiros

Changed (B)

Solta ficheiros aquí ou fai clic para buscar

PDF sen límite de tamaño de ficheiro

Explorar ficheiros

Os teus ficheiros nunca saen do teu dispositivo. Todo o procesamento realízase localmente no teu navegador.

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

Como funciona

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.