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Software · Office & notes

Lockbook

Lockbook is a note-taking program, available on Linux: Markdown support.

  • Limited free plan
  • Linux
  • Open source
  • No account

Overview

Lockbook is a note-taking program, available on Linux.

Features described in its Flathub listing and on its official website: Markdown support.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Lockbook is an open-source notebook for markdown notes and SVG drawings, encrypted on your device and shared only by invitation.” — official website, 10 November 2026
  • “Lockbook is an open-source notebook for markdown notes and SVG drawings, encrypted on your device and shared only by invitation.” — official website, 10 November 2026

At a glance

Lockbook offers a limited free plan; advanced features or heavier use are paid.

It is in the public domain (Unlicense): no reuse conditions.

Plans and conditions

  • Free plan: basic features are free; others are reserved for paid plans.
  • Paid subscriptions from 2,99 $ per month (price read on the official page).

Strengths

  • Open source code
  • No account needed
  • No credit card asked
  • Commercial use allowed

Weaknesses

  • Limited free plan

About

Lockbook is an open-source notebook for Markdown notes and drawings, encrypted on your device and shared only by invitation. Notes are Markdown files and drawings are SVGs, kept in ordinary folders. Open them in any other app and you'll find nothing missing. Your notes are encrypted on your device, so no one else can read them, not even us. Sign up with just a username: we never ask for an email, a phone number, or a name. Type punctuation and watch plain text turn into headings, lists, tables, and code Sketch, handwrite, and diagram on an infinite canvas Mention one note in another and see which notes mention it back Find a note by its name or by what's in it, privately and offline Keep photos, PDFs, and everything else worth keeping Share any note or folder with read or write access Edits sync without being dropped, duplicated, or clobbered Also on Windows, Mac, iPhone, iPad, and Android

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Official plan pages (pricing, licence, terms) (limits, free status, commercial use) —
  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from GitHub (credit card, account, source code, publisher, licence, free status, platforms, commercial use) —
  • Last technical check: 7 November 2026
  • Description from Flathub — AppStream (Flathub)

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