Regex Pattern Tester

Writing a regular expression by trial and error inside actual code is slow and easy to get subtly wrong.

Type a pattern and some test text, and see every match highlighted instantly as you adjust the pattern.

Toggle common flags like global, case-insensitive, and multiline, and watch the results update immediately.

See the exact number of matches found, along with each matched substring listed separately below.

Catches obviously broken patterns and shows a clear error message instead of failing silently.

A fast way to get a regular expression right before pasting it into real code.