Client-Side Text Diffing

Text Comparison Tool

Compare two versions of text to instantly identify additions, deletions, and sentence modifications with side-by-side or inline highlighting.

Your text is processed in your browser and is not saved or sent to our server. Anonymous usage events may be collected to help us improve the tool.

Use Cases for Online Text Comparison

  • Proofreading & Editing: Identify precise edits made between draft revisions.
  • SEO Content Audits: Compare updated web copy against old articles to verify keyword adjustments.
  • Code & Contract Review: Inspect changes in disclaimers, policy documents, or code snippets.

Frequently Asked Questions

No. All text diffing algorithms run locally inside your browser using JavaScript. Your original and revised texts are never sent to or saved on our servers.

Similarity percentage is an estimate calculated by comparing identical character sequences against total added and removed text.

Yes. Additions and removals use explicit text tags ([+] and [-]) alongside accessible ARIA labels and distinct background contrast highlights, ensuring compliance with WCAG 2.2 AA guidelines.

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