Question 1

Is it safe to test regex online?

Accepted Answer

Safe. The regex and test text are executed locally in your browser and not uploaded to any servers.

Question 2

What regular expression syntax is supported?

Accepted Answer

This tool uses the browser's native JavaScript regex engine, supporting ECMAScript standard syntax, including capturing groups, named groups, lookaheads and lookbehinds (depending on browser version), and modifiers like g/i/m/s/u/y.

Question 3

Why is there only one match result?

Accepted Answer

If the 'Global (g)' modifier is not checked, the regex only returns the first match. To match all occurrences, please check the g modifier.

Regex Tester

Regular Expression

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