Developer TOOL
Regex Tester
Test a JavaScript regular expression against text and list matching substrings.
Regex Tester
How to use this tool
- Enter the requested values.
- Review the estimate and formula.
- Adjust assumptions to compare outcomes.
About this tool
Test a JavaScript regular expression against text and list matching substrings.
Frequently asked questions
Are my inputs uploaded?
No. The calculation runs in your browser and the inputs are not sent to a server.