Compare text or source code side-by-side with visual diffs.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Insert original text in the left pane and revised text in the right pane.
Toggle between unified diff or side-by-side split view comparison.
Inspect character-level and line-level insertions and deletions highlighted in green and red.
The Myers diff algorithm runs in Web Workers to handle thousands of lines with zero UI freezing.
No. All text comparison executes completely within your browser session.
Zero-egress companion tools in the Developer Tools suite
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