Test a regular expression against your text and see every match highlighted live.
Type your pattern into the regex field, paste your sample text below it, and every match gets highlighted instantly as you type. No button to click — the highlighting updates live with every keystroke.
The g flag finds all matches instead of stopping at the first one, i makes matching case-insensitive, and m changes how ^ and $ behave so they match the start and end of each line rather than only the whole string. You can toggle any combination of these.
No. Matching runs entirely in your browser using JavaScript's built-in regex engine. Nothing is transmitted anywhere.
Need something else? See the full tools homepage.