Paste a JavaScript pattern and the flags your code will use.
Local JavaScript regex tester
정규식이 실제 텍스트에서 맞는지 확인하세요.
Run a JavaScript regular expression locally, inspect match positions and capture groups, and keep the test text in your browser.
* Nothing is uploaded. RegexLens runs the matcher locally in a short-lived Web Worker.
Local JavaScript regex tester
Debug the pattern before shipping it
Add representative text, then inspect each match position and capture group.
Simplify patterns that time out before copying a result into a test or ticket.
FAQ
What does RegexLens send?
Does RegexLens upload my text?
No. Matching runs in a temporary browser worker and no request is made.
Which regex engine does it use?
It uses the browser's native JavaScript RegExp engine, so the syntax and flags match JavaScript code.