highlight matches
This tool runs a regular expression against sample text and highlights every match live as you type, along with capture group details, so you can build and debug a regex pattern without leaving your browser.
Debugging a regex pattern that isn't matching what you expect.
Testing a validation pattern (like an email or phone format) against sample inputs.
Extracting or checking capture groups from a pattern before using it in code.
It uses standard JavaScript regular expression syntax, which covers the vast majority of common pattern needs.
Yes — paste a full block of multi-line text and, with the appropriate flags enabled, matches across the whole block are highlighted.
ToolBench runs this tool entirely in your browser. Your file or text is processed on your own device using JavaScript — nothing is uploaded to a server, nothing is stored, and there's no sign-up wall between you and the result. That's true of every one of the 500+ tools on this site, from PDF utilities to unit converters.