Regex Tester
Test and debug regular expressions in real-time. See matches highlighted as you type.
Examples:
//
0 matches
Matches will be highlighted here...
Quick Reference
Characters
- . - Any character
- \d - Digit [0-9]
- \w - Word [a-zA-Z0-9_]
- \s - Whitespace
Quantifiers
- * - 0 or more
- + - 1 or more
- ? - 0 or 1
- {n} - Exactly n
Anchors
- ^ - Start of string
- $ - End of string
- \b - Word boundary
Groups
- (abc) - Capture group
- (?:abc) - Non-capture
- a|b - Alternation
Frequently Asked Questions
What regex flavor is used?
This tester uses JavaScript's RegExp engine, which follows ECMAScript standards. Most patterns work across languages.
How do I escape special characters?
Use a backslash before special characters: \. \* \+ \? \[ \] \( \) \{} \\ \^ \$ \|
Is my data secure?
Yes. All regex processing happens in your browser. Nothing is sent to any server.