Every document you write in Writedown is encrypted before it leaves your browser. Not even we can read it. You get cloud sync, real-time WYSIWYG editing, passkey auth, and private sharing — all backed by plain Markdown.
The tools you expect from a modern editor, built on a zero-knowledge foundation.
Your documents are encrypted with AES-256-GCM before they leave your browser. Keys are derived on your device. Our servers store ciphertext — meaningless noise without your key.
No proprietary formats. No vendor lock-in. Every document is plain Markdown under the hood. Export it, version it, or open it in any text editor on earth.
Write in a clean, distraction-free rich editor. Or drop into raw Markdown source when you need precision. Switch freely — the same document, two views, zero artifacts.
Local-first architecture. Your edits save to your device instantly, then sync to the cloud in the background. Works offline. Picks up where you left off on any device.
Share a document with a w-d.to short link. The decryption key is embedded in the URL fragment — the part that never gets sent to a server.
Sign in with TouchID, FaceID, or a hardware key. No master passwords to forget. Your biometric unlocks your vault — fast and phishing-resistant.
Authentication and encryption are fully decoupled. A compromised login password does not expose your files.
A random AES-256 key encrypts your entire vault. Generated on your device. Never transmitted.
Derived from your 12-word recovery phrase via Argon2id. Wraps the CEK for account recovery.
Derived from your device's Secure Enclave via WebAuthn PRF. Wraps the CEK for daily use. Unlock with a fingerprint.
Google can read every word you type. Writedown can't.
Notion stores data in plaintext on servers. Writedown encrypts it before it leaves your browser.
Obsidian is local-only. Writedown gives you cloud sync and sharing without giving up privacy.
Standard Notes uses a proprietary editor. Writedown is Markdown-native with full WYSIWYG.