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Regex Tester

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

Runs in your browser · No data sent anywhere

Pattern (Regex)

Flags

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

Test String

Highlighted Matches

100%

Browser-Based

yes

Real-Time

yes

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

Frequently Asked Questions

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.