Code / FREE ONLINE TOOL
Regex Tester
Test JavaScript regular expressions online. Inspect matches, capture groups, and positions with live highlighting and useful syntax errors.
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QUICK GUIDE
How to use this tool
Enter a pattern with optional /delimiters/flags, then add test text. Long-running patterns are stopped to keep the browser responsive.
Your input is processed locally. Use Copy or Download to keep your result.
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Need another step? Try a related tool.