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Regex Tester

Live Match · Flags · Capture Groups

Free online regular expression tester. Test regex patterns in real-time with live match highlighting, flag controls and capture group display. No login needed.

✓ Free Forever ✓ No Login ✓ 100% Client-Side ✓ No Data Sent ✓ Mobile Friendly

/…/ REGEX TESTER Live Match · Flags · Capture Groups

Pattern

Flags:

Test String

Matches

Frequently Asked Questions

What regex flavour does ByteKit use?

ByteKit uses JavaScript's built-in RegExp engine which supports most common regex syntax.

What flags are available?

g (global), i (case-insensitive), m (multiline), and s (dotAll) flags are supported.

Does it show capture groups?

Yes — each match shows its index and all named/unnamed capture groups.

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