Test Regex Patterns Instantly
Free Online Regex Tester & String Utilities
Test regex patterns with real-time highlighting, multi-language support, and detailed match statistics. 100% client-side processing for maximum privacy.
Developer Tools
Essential utilities for developers, all free and privacy-first
Advanced Regex Tester
Test regular expressions with real-time highlighting, capture groups, and detailed match statistics.
Visual Regex Builder
Build regex patterns visually with an intuitive drag-and-drop interface.
Base64 Encoder/Decoder
Encode and decode Base64 strings with support for UTF-8 and binary data.
URL Encoder/Decoder
Encode and decode URLs with support for query parameters and special characters.
Hash Generator
Generate MD5, SHA-1, SHA-256, and other cryptographic hashes from text or files.
Text Compare
Compare two text blocks side-by-side with highlighted differences and detailed statistics.
Regex Cheat Sheet
Comprehensive regex syntax reference with examples and copy-paste patterns.
String Utilities
Case converter, text counter, UUID generator, random strings, and Lorem Ipsum generator.
Why RegexKit?
Built by developers, for developers
Real-Time Highlighting
See matches highlighted instantly as you type your pattern.
Multi-Language Support
Test patterns in JavaScript, Python, PHP, Java, Go, and Ruby.
Privacy-First
All processing happens in your browser. Your data never leaves your device.
100% Free
No registration, no ads, no limits. Free forever.
More Developer Tools
Explore our other professional developer utilities
CodeClean →
Modern developer code utilities for formatting and beautifying JSON, JavaScript, CSS, HTML, and more.
DiffMaster →
Professional code comparison tool with syntax highlighting, side-by-side diffs, and merge capabilities.
TextToolbox →
All-in-one text manipulation platform with case conversion, word counting, text cleaning, and analysis tools.
DataValidate Pro →
Developer data validation and conversion suite for JSON, XML, CSV, and API testing with schema validation.
Ready to test your regex patterns?
Start testing instantly - no registration required