SpecDown
AI-native Spec as Code — Markdown editor for engineers

Markdown specs that
ship with your code.

AI-native Markdown editor online. Markdown git sync, Markdown CLI, Markdown MCP for AI, and embed Markdown into any blog or page — the Spec as Code workspace built for AI-native teams.

No credit card requiredFree plan to startSet up in 2 minutes
README.md — SpecDown

1 # Getting Started

2

3 Welcome to **SpecDown** — your

4 documentation workspace.

5

6 ## Features

7

8 - Monaco editor

9 - Live preview

10 - Git sync

11

12 ```mermaid

13 graph TD

14 A[Write] --> B[Preview]

Getting Started

Welcome to SpecDown — your documentation workspace.

Features

  • Monaco editor
  • Live preview
  • Git sync

mermaid diagram

Write
→
Preview

Monaco

Editor engine (VS Code)

MCP

AI integration standard

Git

Git-synced

Free

To get started

Features

AI-native Spec as Code — everything your Markdown needs

Built for AI-native, spec-driven teams: Markdown editor, CLI, MCP, git sync, embed, and online sharing in one platform.

Markdown Editor Online

VS Code–grade Monaco-based Markdown editor with live preview, syntax highlighting, multi-tab workspace, and split-view. The best Markdown editor online for spec-driven teams.

Markdown Online Sharing & Embed

Share Markdown docs via public link. Embed Markdown into any blog, portfolio, or webpage with one line of code. Create pages with Markdown embed instantly.

Markdown Git Sync

Two-way Markdown git sync with GitHub and GitLab. Commit, push, and pull Markdown specs directly — keeping your docs version-controlled alongside your code.

Markdown MCP — AI-Native Integration

AI-native by design: the MCP server lets Claude, Cursor, or any AI assistant read your specs directly — no copy-paste. The foundation for AI-native, spec-driven development.

Markdown CLI

Spec CLI to read, push, pull, and search Markdown docs from the terminal. Automate in CI/CD pipelines. AI-operable — lightweight enough for any automation script.

Spec as Code Collaboration

Spec-driven teamwork: invite teammates as Owner, Editor, or Viewer. Inline comments, version history, and real-time collaboration on Markdown specifications.

Workflow

Simple as 1-2-3

01

Create a project

Set up your documentation workspace in seconds. Organize docs in folders, set access permissions.

02

Write Markdown specs

Use the Markdown editor online with live preview. Paste images, draw Mermaid diagrams, write spec-driven docs with confidence.

03

CLI, MCP, Embed & Sync

Push to Git, embed Markdown into your blog, use the Spec CLI, or let AI browse via Markdown MCP. Your specs stay in sync everywhere.

Start writing Markdown specs
that ship with your code.

Free Markdown editor online — no credit card. Spec as Code in 2 minutes.