The best place for your notes

Lockbook is an open-source app for Markdown notes and drawings, encrypted on your device and shared only by invitation.

Download Other platforms

25 MB free · No email required

Lockbook on macOS: a Markdown note open beside the file tree

Open formats

Files you could still read if we disappeared.

Notes are Markdown.

Headings, lists, and other formatting works seamlessly across Reddit, Substack, ChatGPT, GitHub, and more. Lockbook notes are Markdown, the universal language of the internet.

Drawings are SVG.

Lockbook drawings look sharp at any size and in any application because they’re SVG, the universal format for scalable graphics.

Folders are folders.

Your Lockbook stays organized wherever you export or back it up because it’s plain folders, the universal way to organize files.

Your home for everything.

Use Lockbook to write notes and drawings, preview photos and PDFs, and store anything else.

Typing a todo list with work, errands, and home sections, a code block, bold text, and a link, then dragging a task and folding a section.

documents/sketch.svg

Loading the live canvas…

documents/

$ lockbook export / ~/documents 12 items

journal

kitchen

recipes

travel

notes.md

sketch.svg

bread.md

quotes.md

lamination.svg

2026-08-26.md

budget.md

packing.md

documents/finances

documents/finances 12 items

taxes-2025

receipts

w2-2025.pdf

lease.pdf

passport-scan.png

receipt-0412.jpg

budget.csv

insurance.pdf

car-title.png

isp-invoice-jun.pdf

compose.yml

kyoto-subway.png

Encryption

We built a notebook we can’t read.

Lockbook encrypts your notes on your device before they sync, so no one else can read them — not even us. When you share a note, only the people you invite can open it.

your phone plaintext

‹1984.md

Finished 1984 on the train.

The telescreen never had to watch everyone. It only had to make everyone feel watched.

I write differently when I feel watched. So this lives here now.

encrypted before it leaves

our server ciphertext

mK2x+9QfLw3eYaZv0dR
u8PJq4Tn6RcXbGdV1e+
Hs5AyEw7Zk+jMoN2iQd
p7Rc/Xw2mBhT4nEuJ8f
d3FrUvLB9tXq/W6pCsA
Qn9tYe2L+cVw4xKzM0b
aZ7fHs1Dm8Rj/Ep3TvW
kW4uNc6Bx9Ly+Gq2Pf0
tJ1oRd5Va3Zm/Ck8Xy+
e6Ms2Hf9Ub7Nw0Lq+Yi

How the cryptography works →

Platforms

Native Everywhere

Lockbook is built for each platform it runs on, so it’s fast and feels right on your Mac, iPhone, Android, Windows, or Linux device. Your notes live on your device, so they’re there even when the internet isn’t. See it on:

workspace the editor & canvas every app embeds Learn more →

lb-rs encryption, sync, storage Learn more →

Lockbook on iPhone: editing a Markdown note

Lockbook on Android: the Kyoto planning note with a checklist and travel links

Lockbook desktop: the Kyoto planning note open beside the file tree

Lockbook CLI on Linux: listing the travel folder and reading the Kyoto planning note

Developers

Scriptable all the way down.

Search with fzf, edit in $EDITOR, pipe notes into anything, or run lockbook fs to mount everything as a drive. When the shell isn’t enough, build on the same Rust library our apps use.

CLI reference → lb-rs on crates.io → Library documentation →

zsh — lockbook

lockbook — the private, polished note-taking platform

USAGE
    lockbook <command> [args...]

COMMANDS
    account   account management commands
    copy      import files from your file system
    edit      edit a document
    export    export a lockbook file to your file system
    fs        mount your files as an NFS drive
    list      list files and file information
    search    search file paths and document contents
    share     sharing related commands
    sync      sync your local changes back to lockbook servers

Pricing

Be the customer, not the product.

We sell a notes app, not your data.

Free

$0

25 MB of encrypted storage

Room for thousands of notes. Every feature included.

Download

Premium

$2.99/month

30 GB of encrypted storage

Room for photos, PDFs, and everything else.

Subscribe in the app

The best place for your notes notes