Write a regular expression and watch every match light up in your test text, with each capture group listed and a live replacement preview. Uses the JavaScript flavour.
loading toolHow to test a regex
- Type the pattern and flags.
- Paste the test text.
- Read the highlighted matches and groups; add a replacement to preview it.
Good to know
- Common flags:
gevery match,iignore case,m^ and $ per line,sdot matches new lines,uUnicode. - Named groups like
(?<year>\d{4})are listed by name.
Questions
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
