ABOUT THE TOOL

Text review, with less guesswork.

Text Compare Pro is a free tool for comparing two versions of plain text. It helps writers inspect revisions, developers review code and configuration changes, and anyone find edits between document versions.

How comparison works

The tool first finds matching lines, then aligns related lines within small changed sections. Word or character highlighting reveals edits inside those lines. Line mode provides a broader overview. The comparison engine uses the open-source jsdiff library, with a separate alignment and display layer.

Designed to stay local

Your inputs are processed in a browser worker, without uploading them to a comparison service. No account is required. Imported files are read locally, and exported reports are downloaded to your device.

Know the limits

This is a plain-text comparison, not a semantic code analyzer, legal review service, or Word/PDF parser. Moved passages may appear as additions and deletions. Repeated text can have multiple valid alignments. Large replacement blocks remain separate additions and deletions to keep work bounded. Complex lines may fall back to whole-line highlighting, with a notice.

Each side supports up to 200,000 characters and 5,000 lines. Review important changes yourself before relying on a comparison.

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