Regex Tester

Test and validate regular expressions with real-time matching, group capture, and replacement features. Perfect for pattern validation and text processing.

Regex Tester

Test regular expressions with real-time matching and replacement. Supports all JavaScript regex flags and features.

Regular Expression Pattern

Valid

Test String

0 matches

Enter a regex pattern to see matches

Common Patterns

Quick Reference

Character Classes

\d - Digits (0-9)

\w - Word characters

\s - Whitespace

. - Any character

Quantifiers

* - 0 or more

+ - 1 or more

? - 0 or 1

{n,m} - Between n and m

Anchors

^ - Start of line

$ - End of line

\b - Word boundary

Tips

• Use parentheses () to create groups

• Use (?:) for non-capturing groups

• Use (?<name>) for named groups

• Escape special characters with \

• Use online regex visualizers for complex patterns