Markdown-to-publishing prep for technical writers

Publish Markdown to Substack without reformatting.

StackDraft turns technical Markdown into publisher-ready rich text.

Turn drafts from Obsidian, Cursor, VS Code, or local files into clean rich text without reformatting by hand.

Open StackDraft

Draft stays in your browser

Paste Markdown from Obsidian, Cursor, VS Code, or local files

Copy platform-safe rich text instead of raw Markdown

Keep title and body separate for web editors

Convert fragile blocks like Mermaid diagrams and tables

Markdown draft

# Claude Code agent loop

```mermaid
flowchart LR
  Dev[Developer] --> Model[OpenAI / Claude]
  Model --> Tools[Tests and files]
  Tools --> Review[Human review]
```

| Step | Agent does | Human checks |
| --- | --- | --- |
| Plan | Proposes edits | Scope and risk |
| Patch | Changes files | Diff quality |

Publisher-ready copy

TitleClaude Code agent loop

BodyRich text, not raw Markdown

BlocksDiagrams and tables handled

Question

Agent

Review

Plan

Diff

Tests

DeveloperLLM agentReview

Paste

Bring in the Markdown draft you already wrote elsewhere

Prepare

Preview rich text and convert fragile Markdown blocks

Copy

Paste clean title and body into Substack or Medium

Draft where you think

Write in Obsidian, Cursor, VS Code, GitHub Markdown, or a local file, then prepare the post in one pass.

Paste rich text

Copy a clean title and rich-text body separately instead of pasting raw Markdown into the editor.

Handle fragile blocks

Convert Mermaid diagrams, tables, code, math, and references before they break in a web editor's paste flow.

Built for the difficult blocks

A Markdown-to-Substack workflow for technical posts.

Substack does not parse a complete Markdown document when you paste it. StackDraft renders the source first, separates the H1 title from the body, and puts clean rich text on your clipboard.

GitHub Flavored Markdown tables become high-resolution images during copy. Mermaid code becomes a static diagram. Publishing checks flag heading jumps, local image paths, missing alt text, long code, and table layouts that are likely to fail in email.

Read the complete Markdown workflow

20-case Markdown compatibility report

Inspect exactly what StackDraft preserves, converts, flags, and leaves for destination review.

View evidence

Publishing field guides

Solve the format before it reaches the inbox.

View all guides

Substack tables

How to add a table to a Substack post

Turn a Markdown table into a crisp, mobile-safe image and publish it with useful alt text.

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Publishing workflow

Markdown to Substack without reformatting

Preserve headings, links, lists, code, tables, and diagrams through a clean rich-text handoff.

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Technical writing

Readable code blocks in Substack email

Move fenced code into the editor and keep examples useful on a narrow phone screen.

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