Regex Tester

Test regular expressions against your text in real time, with live match highlighting.

Regular expression

Flags

g global i ignore case m multiline s dotall

Test string

Result — 0 match(es)

How to use

Type your regular expression and choose flags (global, ignore case, and more).
Paste the text to test against.
Matches highlight live, with a running match count.

Frequently asked questions

What regex flavor is used?

JavaScript (ECMAScript) regular expressions — the same engine every modern web browser uses.

Is my text sent anywhere?

No. Matching runs entirely in your browser, so your patterns and text stay private.

🔒 This tool runs entirely in your browser. Nothing you enter is uploaded, logged, or stored.

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