Regex Tester

Test any regular expression against sample text. See matches highlighted instantly as you type.

Runs in your browser · No data sent anywhere

Regex Tester & Debugger

Test and debug regular expressions with real-time matching and highlighting

100%

Browser-Based

✓

Real-Time

✓

Syntax Highlight

∞

Free Uses

🔍

Real-Time Match

🎯

Group Capture

⚡

Instant

🔒

100% Private

\d+ — Match digits

[a-z]+ — Match letters

\w+@\w+\.\w+ — Email

https?://.+ — URL

\s+ — Whitespace

^start — Begins with

end$ — Ends with

(group) — Capture group

\d — Digit [0-9] \w — Word char [A-Za-z0-9_] \s — Whitespace . — Any character [abc] — a, b, or c [^abc] — Not a, b, c [a-z] — Range a-z

* — 0 or more + — 1 or more ? — 0 or 1 {n} — Exactly n {n,} — n or more {n,m} — n to m

Pattern (Regex)

Flags

g (global) i (case-insensitive) m (multiline)

Test String

Highlighted Matches

Does the tester support RegEx flags like 'global' or 'case-insensitive'?

Yes, you can toggle flags such as g (global), i (insensitive), and m (multiline) to test different matching behaviors.

Will it highlight which part of my text matches the pattern?

Yes, as you type your regular expression, all matching substrings in your test text are highlighted in real-time.