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Developer

Regex Tester

Test regular expressions against sample text with live matches and groups.

Client-side only

Processing is local to this browser. DevPaste does not upload pasted content, JWTs, .env values, editor contents, or HMAC secrets to a server.

Regex controls

Set a pattern, choose flags, or load a saved example.

Regex pattern

//gi

Flags

Examples

Test text

Matches update as you type.

Monaco

Live result

2 matches

Pattern: /(?<user>[a-z0-9._%+-]+)@(?<domain>[a-z0-9.-]+\.[a-z]{2,})/gi

Highlighted Matches

Contact ada@example.com or support@devpaste.dev for help.

Match Details

Match 1 at index 8

Full match: ada@example.com
Index: 8 to 23
Groups: $1: ada
$2: example.com
Named groups: user: ada
domain: example.com

Match 2 at index 27

Full match: support@devpaste.dev
Index: 27 to 47
Groups: $1: support
$2: devpaste.dev
Named groups: user: support
domain: devpaste.dev