zeromd offers a straightforward solution for syncing Obsidian vaults across multiple devices, including iPhone and macOS, using local files. With zero costs, no signups, and no maintenance, it allows seamless access to markdown files, empowering users with direct AI interaction and ensuring total ownership of their data.
Local-first Obsidian multi-device sync. Zero cost. Zero signup. Zero maintenance.
Why This Exists The most AI-native knowledge base isn't a SaaS product with an API. It's a folder of markdown files on your disk.
And .md isn't done evolving — Mermaid already turned plain text into live diagrams. Interactivity might be its next chapter.
Obsidian stores everything as plain .md files. AI tools like Claude Code can read and write your knowledge base directly:
No API No plugins No middleware
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