Code · Regex

Regex Tester

Test regular expressions against sample text and inspect every match and capture group live.

Test string

2 matches

ada@example.comindex 8

$1: ada$2: example

grace@devbelt.netindex 27

$1: grace$2: devbelt

Frequently asked

Which regex engine is this?

The browser's native JavaScript RegExp — the same one your code runs against.

Is my data uploaded anywhere?

No. This tool runs entirely as JavaScript in your browser — your input never leaves your device and nothing is logged.

Enter your pattern and flags.

Paste a test string.

See all matches, positions and groups update instantly.