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Regex Tester
Test JavaScript regular expressions live. Toggle flags, see all matches, and inspect capture groups.
Private - runs in your browser
No signup required
Free forever
How to use Regex Tester
- Type your pattern.
- Add flags (g, i, m, s, u).
- Paste your test string.
- Matches highlight as you type.
Features
- Live highlighting
- Group inspection
- All standard JS flags
Why use it
- Build correct patterns faster
- Validate input rules
- Quick syntax checks
Frequently asked questions
Which flavour of regex?
JavaScript (ECMAScript). It differs slightly from PCRE - for example look-behind support varies.