Live RegEx Tester & Java Generator
0 matches Quick Presets:
// Generating snippet...Key Features & How to Use
⚡ Real-Time Evaluation
Matches update as you type. Immediate visual feedback with color-coded badges and clear match counters.
☕ Java String Escaping
Never struggle with double-backslash escaping in Java again. Automatically produces thread-safe Pattern.compile() code.
🎯 Production Presets
One-click presets for standard enterprise tokens: RFC emails, HTTP URLs, IPv4 addresses, ISO dates, and JWT authorization headers.
🔒 100% Client-Side Privacy
Your test strings, auth tokens, and regex patterns are evaluated entirely in your browser engine. Nothing is transmitted over the network.