What is a Regex Tester?
A regex tester lets you write and test regular expressions against sample text in real time. Matches are highlighted instantly as you type, with support for common flags like global, case-insensitive, and multiline. Perfect for building and debugging patterns for validation, search, or data extraction.
Frequently Asked Questions
Which regex flavor is used?
JavaScript regex engine, which supports lookahead, lookbehind, named groups, and Unicode.
Does it support flags?
Yes — global (g), case-insensitive (i), multiline (m), dotAll (s), and Unicode (u).
Is my data sent anywhere?
No. Everything runs locally in your browser.