Professional markdown editor with built-in AI prompt testing. A sovereign workspace for prompt engineering with zero-knowledge architecture.
What it does:
- Write and edit Markdown with live preview (Obsidian-level editing quality)
- Test prompts against 20+ AI models (GPT-4o, Claude, Gemini, Llama, etc.) side by side
- Real-time token counting across all major tokenizers
- Smart template variables ({{variable}} syntax with dropdowns, multiline, lists)
- GitHub sync — pull/push files and gists directly
- PromptOps — deterministic execution with parameter hardening, PII scanning, and snapshot certification
- Multi-format export (PDF, HTML, JSON, clipboard)
Key differentiators:
- Zero-knowledge architecture — nothing leaves your browser, no accounts, no tracking
- Bring your own API keys — replaces $80–230/mo in tools (PromptLayer, Typora, etc.)
- Battle mode — run the same prompt against multiple models simultaneously and compare results
- 7 languages supported (EN, ZH, JA, KO, ES, PT-BR, DE)
Comments
Publisher
Launch WeekMar 2 - 9, 2026
Platformweb
Pricingfreemium
Tags
#ai
