Regex Tester
The Regex Tester is a free online tool that allows you to test and validate regular expressions against sample text. It highlights matched patterns in real time, making it easier to understand and debug regex logic.
1. Enter a regular expression pattern.
2. Add optional flags such as g, i, or m.
3. Paste your test text.
4. Click Test Regex to highlight matches.
Why use this tool?
Regular expressions can be complex. This tester helps you experiment, validate patterns, and understand matches visually.
Related Programming Tools
Note: This tool uses JavaScript’s RegExp engine and may behave differently from regex engines in other programming languages.