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🔎 Regex Tester

Test regular expressions against any string — see matches, capture groups, and errors instantly.

Regular expression

global (g) ignore case (i) multiline (m) dotAll (s)

Test string

Enter a pattern and test string

Why use OmnifyTools Regex Tester?

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Live Testing

See match count and captured groups update as you edit your pattern.

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Common Flags

Toggle global, case-insensitive, multiline, and dotAll modes with one click.

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100% Private

Your patterns and test data never leave your browser.

Which regex flags are supported?

Global (g), ignore case (i), multiline (m), and dotAll (s) — the most common JavaScript regex flags.

Can I see capture groups?

Yes — each match lists the full match, captured groups, and index position.

Is my test data private?

Yes. Patterns and test strings are processed entirely in your browser.

Who uses a regex tester?

Developers validating form patterns, log parsers, data extractors, and search-and-replace rules.