Free online utility · Gentooly
Test your regular expressions
Write a pattern, paste sample text and see what matches before you put the expression into your code.
Use the interactive tool to complete your task. Core utilities are free to use. AI Studio, our separate AI product, is coming soon.
Use Regex Tester →How to use this tool
- Open the Regex Tester and enter your pattern.
- Paste the text you want to test against.
- Review the matches and captured groups, then adjust the pattern.
Common questions
Which regex flavour does it use?
It follows the JavaScript regular expression syntax available in your browser, so behaviour can differ from other languages.
Why does my pattern not match?
Check anchors, escaping of special characters and flags such as case-insensitive.
Is my text uploaded?
The tool is designed to run in your browser. Check the tool interface and privacy notice for the current processing behaviour.