Regex Tester
Test your regular expressions against sample text.
//
Matches (2)
Match 1Index: 0
helloGroups:
Group 1: helloMatch 2Index: 6
worldGroups:
Group 1: worldHow to use
Enter your pattern, set any flags you need (like 'g' for global or 'i' for case-insensitive), and type or paste your test text. Matches update live, with each match's index and any capture groups listed below it.
- Enter your input in the text area provided.
- Adjust any settings or options if available.
- The results will be generated automatically or upon clicking the action button.
- Copy the result to your clipboard using the copy button.
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About Regex Tester
Regex Tester runs a regular expression against sample text and shows every match live as you type, including any capture groups within each match.
Common Use Cases
- Debugging why a regex isn't matching what you expect before using it in code.
- Testing an email, URL, or phone-number pattern against a range of sample inputs.
- Understanding what a capture group in an existing regex actually extracts.
Tips
The 'g' (global) flag changes whether the tool finds every match or stops at the first one — if you're only seeing one result but expect more, check whether 'g' is included in the flags field.