# Lockbook

> Open-source encrypted notes app with Markdown and drawing

Lockbook is an open-source, end-to-end encrypted notes app for writing in Markdown, sketching on an SVG canvas and storing files. An account is a username and a generated secret key, with no email or password, and files or folders can be shared with other users. It has native apps for iOS, macOS, Windows, Linux and Android plus a command-line client, and the server can be self-hosted. The free plan includes 25 MB of storage.

- **Category:** Note-Taking Apps
- **Made by:** Lockbook LLC (since 2020)
- **Website:** https://lockbook.net
- **Runs on:** macOS, Windows, Linux, iOS, Android
- **Facts last checked:** Oct 9, 2026

## Pricing

Lockbook has a free plan. Paid plans start at $2.99 per month.

- **Pricing model:** Free plan
- **Free plan:** 25 MB of storage with sharing and collaboration, Markdown and drawing support, and offline mode.
- **Free trial:** None listed.

| Plan | Price | What you get |
| --- | --- | --- |
| Free | $0 | 25 MB of storage with sharing and collaboration, Markdown and drawing support, and offline mode. |
| Premium | $2.99 per month | 30 GB of storage with the same features as Free. It is bought inside the app; the US App Store lists it as a $2.99 in-app purchase. |

Read from https://lockbook.net/ on Oct 9, 2026. Prices change, so confirm with Lockbook before buying.

## Key features

- **End-to-end encryption:** Content, including file names, is encrypted on the device. The vendor's staff can see only what the server needs, such as file counts, document sizes and the shape of the file tree.
- **Key-based accounts:** Signing up takes a username and creates a secret key, shown as a 24-word phrase or a QR code. No email, phone number or password is collected.
- **Markdown editor and SVG canvas:** Notes are written in Markdown and drawings are saved as SVG, both open formats that other tools can read. PDFs and images can be previewed.
- **Sharing and collaboration:** A file or folder can be shared with read or write access, and the recipient can place it anywhere in their own file tree. Only the owner is billed for the space it takes.
- **Native apps, offline support and a CLI:** Each platform has its own native client that works offline and syncs later. A command-line client keeps an encrypted local store and syncs on request.
- **Self-hosting:** The server can run on your own infrastructure. Accounts on a self-hosted server cannot collaborate with users on the main Lockbook server.

## Good for

- People who want notes and files the provider cannot read
- Markdown writers who also sketch or keep files beside their notes
- Developers who want a command-line client and open formats

## Worth knowing

- The free plan holds 25 MB. The only paid plan is 30 GB for $2.99 a month, bought inside the app.
- The secret key is the only way into an account and cannot be recovered if it is lost.
- There is no web app: the site lists native apps for iOS, macOS, Windows, Linux and Android, and a CLI.
- The site says the product is in its infancy; document history, comments and a browser clipper are listed as coming soon.

**Tags:** End-to-end encrypted, Open source, Self-hostable, Works offline, Notes, Markdown, Real-time collaboration

## Alternatives

- [Standard Notes](https://toolgpa.com/tools/standard-notes): End-to-end encrypted notes app with open source clients. [Compare](https://toolgpa.com/compare/lockbook-vs-standard-notes)
- [Notesnook](https://toolgpa.com/tools/notesnook): Open source, end-to-end encrypted notes on every platform. [Compare](https://toolgpa.com/compare/lockbook-vs-notesnook)
- [Cryptee](https://toolgpa.com/tools/cryptee): Encrypted documents, notes and photo storage from Estonia. [Compare](https://toolgpa.com/compare/cryptee-vs-lockbook)
- [Joplin](https://toolgpa.com/tools/joplin): Open source Markdown notes with sync through a service you choose. [Compare](https://toolgpa.com/compare/joplin-vs-lockbook)
- [Obsidian](https://toolgpa.com/tools/obsidian): Markdown note-taking app that keeps your files on your device. [Compare](https://toolgpa.com/compare/lockbook-vs-obsidian)

## Sources

The prices, plans, platforms and features above were read from these pages on Oct 9, 2026:

- https://lockbook.net/
- https://lockbook.net/docs/index.html
- https://lockbook.net/docs/print.html
- https://lockbook.net/docs/installing.html
- https://apps.apple.com/us/app/lockbook-private-notes/id1526775001

Page: https://toolgpa.com/tools/lockbook
Listed by ToolGPA (toolgpa.com).