Free Regex Tester

Test regular expressions against your own text with live, highlighted matches. Free, no sign-up.

Regular expression

Flags

g i m s

Test string

0 matches

✓ 100% free✓ Live highlighting✓ No sign-up

How it works

Three steps, no fuss.

Enter a regular expression and pick your flags.

Drop in the string or sample data you want to match against.

Every match is highlighted live as you type.

FAQ

What regex flavor does this use?

This tool uses JavaScript's native regular expression engine, the same one used in browsers and Node.js.

What do the flags mean?

g = global (find all matches), i = case-insensitive, m = multiline (^ and $ match line breaks), s = dotall (. matches newlines too).

Is my test data sent anywhere?

No, matching happens entirely in your browser.

Is this free?

Yes, completely free with unlimited use.

This free tool is a small taste of what we do. Go4Lead.tech builds custom software, web and mobile apps, and internal tools for businesses.