Developer tools
Regex tester
Test a regular expression live against your text, with matches highlighted and groups shown.
How to use Regex tester
- Type your regular expression and your test text.
- Read the highlighted matches and the groups shown.
- Adjust the pattern until it matches exactly what you intend.
A good use for this
Testing a pattern for validation, searching, or extraction before putting it into code.
Limits
A pattern that matches your test text may still fail on real input — test edge cases (empty strings, unusual characters) before trusting it in production.