Regex Tester

Test and debug regular expressions online

Regular Expression Pattern:

/ /

Flags:

Case insensitive (i) Multiline (m) Single line (s)

Test String:

Common Regex Patterns

Quick Reference

Character Classes

. - Any character
\d - Digit (0-9)
\w - Word character
\s - Whitespace
[abc] - Character set

Quantifiers

* - 0 or more
+ - 1 or more
? - 0 or 1
{n} - Exactly n
{n,m} - Between n and m

Anchors

^ - Start of string
$ - End of string
\b - Word boundary
() - Capture group
| - Alternation