Should I include slashes around the pattern?
No. Enter the pattern itself, then enter flags separately.
Tools
Regex Tester
Test regular expressions against sample text and review match groups.
1. contact@technine.io at 8 2. hello@example.com at 31
Test a JavaScript regular-expression pattern against sample text and review every match with its starting index.
How to use this tool
- Enter a JavaScript pattern without / delimiters, for example \b\w+@\w+\.\w+\b.
- Add flags such as i or m if needed.
- Paste sample text and review the matched text and positions.
Ways to use it
- Check form rules
- Try a JavaScript pattern against representative email, reference or identifier values.
- Inspect repeated matches
- Find every occurrence of a phrase or token in sample text and see where each one starts.
Pattern support
- Patterns use the browser JavaScript RegExp engine and must be entered without /pattern/ delimiters.
- The tool adds the global g flag so it can list all matches and their indices.
- It reports matches and positions only; it does not replace text or emulate another regex engine.
Common questions
Why are all matches returned?
The tool uses the global g flag to list every match.
Can I test a PCRE or Python pattern?
Only if it is also valid in JavaScript RegExp; engine-specific syntax can fail.
Can it replace text?
No. This tool only lists matching text and starting indices.