Developer
Regex Tester
Test JavaScript regular expressions safely in an isolated browser worker.
100% browser-onlyTool Workspace
Enter the pattern without slash delimiters, for example ^[A-Z]+$.
Privacy Notice：Your files are processed locally. They are never uploaded.
How it works
- Enter a JavaScript regular expression and the text to inspect.
- Choose the flags you need, then run the test.
- Review each match index, capture group, and named group.
Was this tool helpful?
We do not collect your input, file names, or account details.
FAQ
Can a regular expression make the page unresponsive?
Matching runs in an isolated worker and stops after 750 milliseconds, so it cannot freeze the NexaForge interface.
Is my input uploaded?
No. Your pattern and test text stay in this browser.