Regex Tester

Test and debug your regular expressions in real-time. See matches highlighted, view capture groups, and toggle flags. Runs entirely in your browser - no data ever leaves your device.

Regular Expression

//g

Test StringJavaScript regex syntax

Quick Reference

Characters

. - Any character
\d - Digit
\w - Word char
\s - Whitespace

Quantifiers

* - 0 or more
+ - 1 or more
? - 0 or 1
{n} - Exactly n

Anchors

^ - Start
$ - End
\b - Word boundary

Groups

(abc) - Group
(?:abc) - Non-capture
[abc] - Char class
a|b - Or

Regex Flags

g

Global

Find all matches

i

Insensitive

Ignore case

m

Multiline

^ $ per line

s

Dot All

. matches \n

u

Unicode

Unicode support

Common Patterns

Email[a-z]+@[a-z]+\.[a-z]+

URLhttps?://[^\s]+

Phone\d{3}-\d{3}-\d{4}

Zip Code^\d{5}(-\d{4})?$

Tips

→Use global flag (g) to find all matches
→Escape special chars: \. \[ \( etc.
→Use (?:...) for non-capturing groups
→Test edge cases and special characters

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