How do I compare two versions of a PDF document?

Upload both PDF files to lnpdf and the tool will display them side by side, highlighting every difference in text, images, and layout so you can review changes at a glance.

Does the comparison detect text changes or only visual differences?

lnpdf can detect both text-level changes (inserted, deleted, or modified words) and visual differences (layout shifts, image changes), giving you a comprehensive comparison.

Can I compare PDFs with different page counts?

Yes. lnpdf handles PDFs with different numbers of pages by aligning matching content and clearly marking added or removed pages.

Compare PDF

View two PDFs side by side and highlight every difference between them instantly.

Original PDF

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Modified PDF

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How to Compare PDF

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Compare PDF Features

Side-by-side visual comparison of two PDF documents
Highlights text additions, deletions, and modifications
Detects visual and layout differences beyond just text
Handles PDFs with different page counts gracefully
Exportable comparison report summarizing all differences

Frequently Asked Questions

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Compare PDF Online

Compare two PDF files online for free. Spot differences between document versions with a visual side-by-side view. Everything runs in your browser — no uploads, no signups, no installs. Works on any device — desktop, tablet, or phone.