Best for
- Pattern debugging
- Match extraction
- Testing form validations
Privacy
Your text and regex patterns are evaluated locally in the browser.
Quick tips
- Use the global flag to find all matches instead of just the first one.
- Watch the groups list to see exactly what each capture group contains.
How to use this tool
- Enter a regular expression pattern.
- Toggle flags like global (g) or case-insensitive (i).
- Type test strings to see matches instantly.
Common questions
What flavor of Regex does this use?
It uses standard JavaScript (ECMAScript) regular expressions natively in your browser.