

RegexPilot
Visual regex builder for Mac featuring drag-and-drop blocks, AI that generates patterns from English, explanations for each regex part, 21 real regex engines, instant engine switching, real-time match testing, sample library, VS Code integration, export, and offline AI support.
Features
- Support for regular expressions
RegexPilot News & Activities
Recent activities
- Maoholguin updated RegexPilot
- Kristofp added RegexPilot
Kristofp added RegexPilot as alternative to RegExr, regular expressions 101, Regex Forge and Expresso
RegexPilot information
What is RegexPilot ?
Build regex visually instead of writing it.
RegexPilot turns regular expressions into a railroad-diagram canvas. Drag blocks from a categorized palette, connect them on a track, and see every part explained in plain English as you work. No more decoding line noise in your head. Javascript and Typescript engine included in free version.
In-app purchases:
AI drafts. You direct. Describe a pattern in plain English and get a working draft in seconds. Then catch what the AI got almost right on the visual canvas — a misplaced anchor, a quantifier off by one — and fix it with a single drag. Bring your own API key for OpenAI, Claude, Gemini, and more, or run fully offline with LM Studio, Ollama, or llama.cpp.
21 regex flavors. Authentic engines. Every flavor routes to the real engine its production code uses — not a JavaScript polyfill pretending to be Python. Java runs against java.util.regex, Ruby against embedded CRuby, C# against .NET, Perl against PCRE2. Switch flavors from the toolbar and see exactly what each engine does with the same pattern.
Test and trust. Paste sample text and watch every match and capture group highlight in real time as you edit. Compose replacements as draggable pill blocks — no guessing at back-reference syntax per flavor. Never ship a regex you haven't actually run.
Your library, growing. 50 hand-picked patterns out of the box — email, URL, IPv4/v6, dates, credit cards, passwords, log parsing — plus flavor-specific examples. Organize with folders and tags. Import and export anytime.
Works where you work. Export railroad diagrams as PNG or SVG for documentation. Open patterns directly from VS Code. Quick-test from Raycast or Alfred. Deep links let you share full editor state.
Themes. Light, dark, and curated community themes (Dracula, Nord, Catppuccin, Gruvbox, Solarized, and more). Semantic pill colours stay intact — the theme recolors the app chrome, not the regex-kind palette. Undo/redo, copy/paste, drag-to-reorder, keyboard shortcuts, full ARIA accessibility. Instant launch. Zero tracking.






