Regex Tester

Fast regex testing with syntax highlighting, real-time matching, capture groups. Free, instant, no account needed.

Regex Tester -- Real-Time Regular Expression Testing & Matching Test regular expressions in real-time with syntax highlighting, capture groups, and built-in presets. A must-have tool for developers. FEATURES: - Real-time regex matching with instant feedback - Syntax highlighting of matches in the test string - Capture group display - Regex flags support (g, i, m, s, u) - Built-in presets for common patterns (email, URL, phone, etc.) - Match count and execution time - Save and recall your own patterns HOW IT WORKS: 1. Click the extension icon 2. Enter a regex pattern and test string 3. See matches highlighted in real-time 4. View capture groups and match details PRIVACY: This extension processes everything locally in your browser. No data is collected, transmitted, or stored externally. Zero network requests. Essential for developers, QA engineers, data analysts, and anyone working with regular expressions.