Regex Tester

The Regex Tester lets you write and debug regular expressions interactively. As you type your pattern, matches are highlighted in the test string instantly — no need to run any code. Flags like global (g), case-insensitive (i), and multiline (m) can be toggled with a single click. Each match is displayed in a results panel with its position, full matched text, and any named or numbered capture groups. The match count is shown at a glance so you can quickly verify your pattern behaves as expected. Useful for validating email addresses, parsing log files, extracting data from strings, or learning regex syntax. Works entirely in your browser with no data sent to any server.