Convert Markdown Between Notion, Obsidian, and GitHub: The Complete Guide for 2026
Tired of your Markdown looking different on every platform? Learn how to convert Notion to GitHub MDM, handle Obsidian wikilinks, and migrate between 18+ platforms.
Why Your Markdown Looks Different on Every Platform
You spend 3 hours writing a perfect Markdown document in Obsidian with callouts, wikilinks, and LaTeX math. Paste it into GitHub and the callouts become raw HTML, wikilinks break, and math disappears. Each platform has its own Markdown flavor.
The 5 Common Markdown Flavors
1. GitHub Flavored Markdown (GFM)
The most widely used dialect. Adds tables, task lists, strikethrough, autolinks, and alert blocks. Used by GitHub, GitLab, and developer platforms.
2. Notion Markdown
A proprietary extension with /-commands, inline database properties, toggle blocks, and callouts. Notion's copy-paste works for simple content but breaks on complex structures.
3. Obsidian Markdown
Based on CommonMark with wikilinks for internal linking and YAML frontmatter. The graph view depends heavily on wikilinks which don't translate to other platforms.
Real-World Conversion Scenarios
Obsidian → GitHub
Developer writes docs in Obsidian with wikilinks and callouts. The converter translates wikilinks to standard markdown links, Obsidian callouts to GFM alert blocks, and preserves code highlighting.
Notion → WeChat
Content marketer writes in Notion with database properties and toggles. The converter handles image migration to WeChat CDN, converts toggles to collapsible sections, and adapts callouts.
Multi-Platform Publishing
A tech blogger publishes the same article across Juejin, CSDN, Zhihu, Medium, and GitHub. Each needs slightly different formatting. Batch conversion gets 5 platform-specific versions in seconds.
Key Features to Look For
- Source and target platform selection
- Image migration to platform CDNs
- Wiki-link to standard link conversion
- Callout/alert block translation
- Batch file processing
- TOC auto-generation
- Mermaid and math formula support
- Client-side privacy
Conclusion
Markdown fragmentation isn't going away. But with the right converter, you write once and publish everywhere without manual reformatting. The key is finding a tool that understands each platform's specific quirks.