Markdown Studio – Zero-knowledge markdown editor with AI Battle Mode

Summary: Markdown Studio is a zero-knowledge markdown editor and AI prompt workspace that runs entirely in the browser without servers or tracking. It enables side-by-side comparison of AI models in Battle Mode, supports token counting for 20+ models, and offers 187 features including Mermaid diagrams, KaTeX math, and GitHub sync.

What it does

It lets users write markdown prompts with smart variables, run them simultaneously against multiple AI models to compare outputs and token usage, and lock prompt configurations with deterministic execution and audit logging.

Who it's for

It is designed for prompt engineers and developers who need to iterate and compare AI model responses securely within a single markdown environment.

Why it matters

It solves the problem of managing AI prompts and outputs across multiple tools while ensuring data privacy by keeping all content and API keys local to the device.