Write without distraction. Store without risk.
Markdown-Native, Zero-Knowledge.
Writedown is designed for researchers, authors, and engineers who demand a distraction-free writing environment but refuse to compromise on data security. Built on local-first principles, Writedown encrypts every document on your device using a key derived from your passphrase. No server ever sees your plaintext documents, your titles, or your folders.
Product Capabilities
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Markdown-Native Workspace
Clean typography, instant visual rendering, keyboard shortcuts, and full support for Github Flavored Markdown (GFM), math formulas, and code snippets.
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Local-First Architecture
Works fully offline. Files are saved and modified locally instantly, preventing latency and ensuring you can write anywhere, anytime.
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Secure Syncing
Keep your library synced across Apple devices, Android, and web. High-performance conflict resolution handles multi-device writing seamlessly.
Security & Trust
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End-to-End Encryption
All data is encrypted in transit and at rest. Encryption keys are derived locally using Argon2id, keeping your documents safe from unauthorized access.
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Git-Backed History
Optionally bind your notebooks to private Git repositories. Gain full access to commit histories, branching, and manual diffs for absolute revision control.
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Open Format Portability
Your notes are stored in plain text Markdown folder structures. There are no proprietary databases, meaning you can export and use your data anywhere.
The Writer's Sovereignty.
"A note-taking tool that can read your thoughts is not a notebookâit is a surveillance node. Real creativity requires the security of absolute privacy."
Ready to secure your writing?
Get started with Writedown today. Open-beta builds are available for iOS via TestFlight, macOS desktop, and client-side web dashboards.