Regex Tester with Live Highlighting
Test regular expressions against your own text with live match highlighting, flags, and capture group details.
Loading tool securely...
Privacy Notice: All files and input data are processed 100% locally inside your browser. No files are uploaded to our servers.
How to Use:
- Type or paste your regular expression pattern into the pattern field.
- Set flags such as g, i, or m, then paste the text you want to test against.
- Matches are highlighted live, with each match and its capture groups listed below.
Key Features:
- Live highlighting of every match directly in your test text
- Support for all standard flags: g, i, m, s, u, and y
- Lists each match with its index and numbered capture groups
- Clear error messages for invalid regular expression syntax