REGEX TESTER
Regex Tester
Test and debug regular expressions with live match highlighting, group captures, and flags.
- Live match highlighting
- Capture group display
- All JavaScript regex flags (g, i, m, s, u)
- Match count and positions
- Common regex reference panel
Tip
Minify, format, and parse code locally without exposing confidential tokens.
How It Works
3 simple steps01
Enter your regex
Type your regular expression pattern.
02
Enter test string
Paste text to test against.
03
View matches
Matches highlight in real time.
Frequently Asked Questions
JavaScript (ECMAScript) regex syntax, which is supported natively in all browsers.
Related Utilities
Your files are processed locally in your browser. No data is uploaded to any server.