Regex Tester
Test and debug regular expressions with real-time highlighting.
On-Device
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About Regex Tester
Regex Tester is a live playground for building and debugging regular expressions. It provides instant visual feedback for matches, groups, and captures, helping you master complex patterns quickly.
How to use Regex Tester
- Enter your regex pattern (e.g., /[a-z]+/g).
- Paste the test string you want to match against.
- Matches are highlighted instantly in the text.
- Check the sidebar for capture group details and match counts.
Use cases for Regex Tester
- Validating user input patterns (emails, phones).
- Extracting data from large text files.
- Learning and testing JavaScript RegExp syntax.