Online Regex Tester - Regular Expression Testing Tool

Professional online regular expression tester and debugger with real-time matching, syntax highlighting, and detailed explanations. Perfect for developers and text processing tasks.

Regular Expression Pattern

Enter your regex pattern:

/ /

Enter your regular expression pattern without delimiters

Regex Flags:

g (Global)

i (Ignore Case)

m (Multiline)

s (Dot All)

Quick Patterns:

Test Text

Enter text to test against your regex:

Paste your text here to test the regex pattern against it

Test Results

0 matches

No matches found yet. Enter a regex pattern and test text to see results.

Match #	Full Match	Groups	Position
No matches to display

Enter a regex pattern to see its explanation here.

Quick Reference

Character Classes

. Any character

\d Digit (0-9)

\w Word character

\s Whitespace

[abc] Character set

[^abc] Negated set

Quantifiers

* 0 or more

+ 1 or more

? 0 or 1

{n} Exactly n

{n,} n or more

{n,m} n to m

Anchors

^ Start of string

$ End of string

\b Word boundary

\B Non-word boundary

Groups

(abc) Capturing group

(?:abc) Non-capturing

(?=abc) Positive lookahead

(?!abc) Negative lookahead