Search and batch substitute text strings with regex and case sensitivity.
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.
Type the search pattern and replacement string.
Paste source text to be modified.
Copy replaced text.
Yes, toggle the RegEx checkbox to enable full JavaScript regular expressions.
Zero-egress companion tools in the Text Utilities suite
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