markdown.gg
A markdown editor and sharing tool that encrypts your document in your browser before it ever leaves your device, so even the service running it can't read what you wrote.
🔗 Visit markdown.gg
Description
Sharing notes through a hosted markdown or pastebin tool usually means trusting the service provider not to read your content, since it sits on their server in plain text. markdown.gg takes a zero-knowledge approach instead: everything is encrypted client-side with AES-GCM before it's transmitted, so the server only ever stores and serves encrypted blobs it can't itself decrypt.
It's a side-by-side Monaco editor with live preview, LaTeX/KaTeX math rendering, and full GitHub Flavored Markdown support (tables, task lists, strikethrough). Shares can be updated after the fact without generating a new link, document history is accessible from a sidebar, and there's a light/dark theme toggle. On the backend it's flexible between SQLite for development and PostgreSQL for production. It's fully open source under the MIT license, so it can also be self-hosted rather than used as a hosted service.
💬 Our review
The short version: for markdown notes you actually care about keeping private — credentials in a shared doc, internal notes, anything sensitive — the client-side, zero-knowledge encryption here is a meaningful step up from a typical pastebin or hosted markdown tool that stores your content in plain text on its server.
Against a general-purpose pastebin or hosted markdown viewer like HackMD, markdown.gg's differentiator is specifically privacy: the server literally cannot read your content, which HackMD-style tools generally don't guarantee. Against rolling your own encrypted sharing with a script, markdown.gg gives you a polished editor (Monaco, live preview, math rendering) on top of the same privacy guarantee, and being open source, you can verify the encryption claims yourself or self-host it entirely rather than trust a hosted instance.
💰 Pricing
📊 Global score
🤖 AI-enriched data
Open source, licence MIT, auto-hébergeable
Pros
Chiffrement côté client AES-GCM, le serveur ne peut pas lire le contenu
Éditeur Monaco avec aperçu live et rendu LaTeX/KaTeX
Open source et auto-hébergeable
Cons
Moins connu et éprouvé qu'un outil établi comme HackMD
Auto-hébergement demande une configuration technique
Historique de versions moins riche qu'un outil collaboratif complet