DEDICATED TOOL PAGE

Test a JavaScript regex and inspect every match.

Enter a pattern and flags, then test it against pasted text to see all matches and capture groups. This page is built for quick debugging without opening a full coding environment.

Open in full workspace More practical guides

DEVELOPER TOOL

Run the tool

A direct landing page helps because “regex tester” is a recognizable stand-alone query, especially for developers and technical writers.

Text to test

Second input

Matches

WORKING TIPS

Regex is easier to debug when the page is focused.

Start with one simple example

Build the smallest pattern that matches one target string first. Complexity is easier to add than remove.

Check flags deliberately

The same pattern behaves differently with global, case-insensitive or multiline flags. Make the flags part of the test, not an afterthought.

Read capture groups carefully

Capture output often tells you faster than the full match whether the pattern is really structured the way you intended.

Common questions

What regex flavor does this page use?

It uses the JavaScript regular expression engine available in the browser.

Why does a pattern match only once?

Check whether the global g flag is enabled. Without it, you may only see the first match.