Free Regex Tester — Test Regular Expressions Online
Type a pattern and text and see the matches highlighted.
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How to do it
- 1Choose your settings
Fill in the details or pick the options you need.
- 2See the result
The preview updates right away as you change things.
- 3Download or save it
Save the result to your device. Nothing is sent to or stored on a server.
About this tool
Build and test regular expressions with JavaScript syntax. Matches are highlighted in your text and listed with their position and groups. Set flags such as g, i, m, s, u and y. Good for learning and for checking patterns before using them in code.
Frequently asked questions
Which regex flavour is used?
JavaScript, the one used in browsers and Node.js.
Why do I see an error?
The pattern is not valid. The message tells you what is wrong, such as an unclosed bracket.
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