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Regex Tester
FreeNo signup required · Works in your browser
Write regex patterns and see matches highlighted instantly. Test against multiple strings, explore capture groups, and learn with built-in explanations. Supports JavaScript, Python, and Go flavors.
What you can do
Real-time pattern matching
Match highlighting with groups
Multiple regex flavors (JS, Python, Go)
Common patterns library
Pattern explanation in plain English
Popular templates
Pre-configured for your specific use case
Frequently Asked Questions
Is the Regex Tester really free?
Yes, 100% free. No signup, no credit card, no hidden fees. Use it as many times as you need for any project.
Can I use it for commercial projects?
Absolutely. The output is yours — use it for personal projects, client work, or your startup. No restrictions.
Who built this?
Josué Barros, a software engineer (ex-Sephora · ex-Bradesco · ex-Indeed). Part of the BoilerForge free tools suite.