Upload two versions of a PDF and view highlighted differences page by page, directly in the browser. Ideal for reviewing contracts, legal documents and reports. No server upload.
Drag the first PDF to compare here
or drag the file here
or open the full PDF editor for annotations, signatures and much more.
Select the original PDF and the modified version. Both files stay on your device.
The tool compares corresponding pages and highlights deletions in red and additions in green.
Scroll through the visual page-by-page comparison or download the report of detected differences.
Everything runs in the browser via WebAssembly. Your PDF is never sent to any server.
No upload, no queue. Processing is local and completes in seconds even for large files.
No required account, no credit card, no watermark. Truly free.
PC, Mac, iPhone, Android — just a modern browser. Safari, Chrome, Firefox or Edge.
Comparing two versions of a PDF highlights the differences between the documents: added, removed or modified text, and layout changes. It is useful for reviewing contract revisions, comparing successive drafts of a document, or verifying that a final PDF matches the approved version.
OnlinePdfEditor shows the two documents side by side with differences highlighted in distinct colours: added in green, removed in red, modified in yellow. Comparison happens in the browser without transmitting files to external servers.
Comparison is most precise on PDFs with selectable text. For scanned PDFs, use the OCR feature first.
Text differences between the two versions are highlighted: removed text in red, added text in green. Graphical differences are also flagged visually.
Yes. If the two PDFs have a different number of pages, the tool compares available pages and flags pages missing from the other version.
For scanned PDFs the comparison is visual (pixel-level), not textual. Use OCR first to extract text if you want a precise textual comparison.
No. Comparison happens entirely in the browser. Neither file ever leaves your device.
Yes. You can download a version of the document with highlighted differences as a PDF or as a text report.
Yes. Textual comparison works with any language supported by the PDF, including documents with non-Latin characters.
Free, in the browser, nothing to install. Upload your PDF and go.
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