Regex Tester Pro

Test, debug and master regex in your browser. AI-powered generation, multi-flavor support, and real-time match highlighting.

Regex Tester Pro - Test, debug and build regular expressions right in your browser. AI-powered generation, real-time highlighting, capture groups. No context-switching to regex101. Stop switching tabs to test a pattern. Regex Tester Pro gives you a lightning-fast, 100% offline regex engine with real-time match highlighting, capture group inspection, and AI-powered pattern generation - all in a clean popup. FEATURES Real-Time Highlighting - See matches light up instantly as you type. Zero lag, zero waiting. AI Regex Generation - Describe what to match in plain English. Get a working pattern in seconds. 3 free/day. Capture Group Inspector - View numbered and named groups from your first match. Debug complex patterns. Find & Replace - Test regex replacements live. See output update as you refine your pattern. One-Click Flags - Toggle g, i, m, s, u, y flags with a single click. No syntax errors. Context Menu - Select text on any page, right-click test regex instantly. Fastest workflow. Pattern History - Save up to 10 patterns free (unlimited Pro). Recall and reuse favorites. Dark Mode - Auto system theme detection or manual toggle. Easy on eyes during late-night debugging. PERFECT FOR Web developers writing validation patterns daily Data engineers parsing logs and extracting structured data QA engineers building test assertions with regex Students learning regular expressions hands-on DevOps filtering log streams with grep/sed patterns HOW IT WORKS: Click icon Type regex Enter test string See matches highlighted Right-click any selected text "Test regex on selection" FREE: Real-time testing, flags, find/replace, 10 saved patterns, 3 AI/day, dark mode PRO: Unlimited patterns, unlimited AI, multi-flavor support, export matches PRIVACY: 100% offline. No data collection. No tracking. No remote code execution. Open source: github.com/theluckystrike/regex-tester-pro https://zovo.one/privacy/regex-tester-pro Built by Zovo - Developer tools that respect your data. https://zovo.one | support@zovo.one