Files are processed only on your computer and are never uploaded.

Check differences between documents

Diff checker tool for PDF, DOCX, and text files with clear highlighting of changes.

Original document
Updated document
Original document

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Diff Checker

A diff checker for document comparison

When you need to check what changed between two documents, a diff checker highlights additions, deletions, and modifications clearly. DiffPaper provides this with local processing.

Check differences with clear highlighting

Upload two documents to see exactly what changed. Additions, deletions, and modifications are highlighted for easy review.

Works with multiple file formats

Check differences in PDF files, Word documents, and text files.

  • PDF diff checking
  • DOCX diff checking
  • Text file diff
  • Side-by-side comparison

Local diff checking

Your files are processed locally in the browser. No upload required for privacy-sensitive documents.

Diff checker FAQ

What is a diff checker?

A diff checker compares two documents and highlights the differences between them, showing additions, deletions, and modifications.

What file types does the diff checker support?

DiffPaper's diff checker supports PDF, DOCX, and text files.

Are files uploaded when checking differences?

No. Files are processed locally in your browser.