Regex Tester

Test JavaScript regular expressions with flags, live highlights, and quick presets — privately in your browser.

Your files never leave your device

Quick patterns

Pattern

g globali ignore casem multiline

Test string

Matches highlighted6 match(es)

Hello regex — test 123 words here.

How It Works

Step 1

Enter a regex body and toggle g, i, m to match your engine needs.

Step 2

See matches highlighted and a match count when global is on.

Step 3

Load common patterns as a starting point, then tweak.

This uses JavaScript’s RegExp flavor. Some features (lookbehind in older engines, atomic groups) differ from PCRE.

No. Matching runs entirely in your browser.

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