What this tool is for
Regex Tester runs a JavaScript regular expression against sample text and lists matches with positions.
When to use it
Use it when building extractors, validation patterns, log searches, or quick cleanup expressions.
What the result means
The result shows each match, its index, and captured groups when present.
Use notes
- Enter the pattern without surrounding slashes.
- The tool uses global matching automatically.
- JavaScript regex behavior may differ from PCRE, Python, or database engines.
Privacy and limits
Everything runs in your browser tab. Avoid pasting production secrets, private tokens, customer data, or proprietary code into any online page unless your team policy allows it.