Regex Tester

Test and validate regular expressions in real-time

Regular Expression Pattern

Flags

Global (g) Case Insensitive (i) Multiline (m) Dot All (s) Unicode (u) Sticky (y)

Test Text

Match Results

0 matches

Enter a regex pattern and test text to see matches

Quick Reference

Character Classes

\d digit

\w word char

\s whitespace

. any char

[abc] a, b, or c

[^abc] not a, b, or c

Quantifiers

* 0 or more

+ 1 or more

? 0 or 1

{n} exactly n

{n,m} n to m

Anchors

^ start

$ end

\b word boundary

Groups

(abc) capturing

(?:abc) non-capturing

\1 backreference

Common Patterns

Tip: This tool uses JavaScript's native RegExp. All matches are highlighted in real-time. Use the flags to modify matching behavior. Click on common patterns to quickly test them.