Development · stable
Regex Tester
Test JavaScript regular expressions with matches and capture groups.
Your data never leaves your browser.
Common flags: g global, i case-insensitive, m multiline, s dot-all, u Unicode.
1 match
production softwareIndex 8–27Groups: production · software
JavaScript regular expressions can exhibit expensive backtracking. This tool limits input, but avoid testing untrusted complex patterns against large text.
How to use it
Clear input. Immediate result.
Enter your input, adjust the available options, and review the result. Processing happens entirely in this browser tab.
Useful for
- Inspect data during development
- Prepare a value for documentation
- Check an input before using it elsewhere
Privacy & limits
Processing happens in this tab. Input is not sent to this site, saved to an account, or included in analytics. Sensible size guards keep ordinary input responsive.
FAQ
Does this upload my input?
No. The implementation runs locally in the browser.
Should I use sensitive production data?
Prefer sanitized values. Local processing reduces exposure, but your browser, extensions, and device remain part of your security boundary.
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