Notesnook

Notesnook is an open-source, end-to-end encrypted note-taking app for people who want their private notes to stay genuinely private. It's a secure alternative to mainstream apps like Evernote, OneNote and Google Keep — everything you write is encrypted on your device before it ever syncs, so not even Notesnook can read it.

What is Notesnook?

Notesnook is a full-featured notes app that happens to be built privacy-first. You get a real editor with tables, checklists, code blocks, math formulas and markdown, cross-device sync, and sharing — but every note is protected with zero-knowledge, end-to-end encryption. It's also 100% open source (GPLv3), so anyone can audit exactly how that encryption works.

Who it's for

Notesnook is for privacy-conscious users who handle sensitive information — medical records, financial details, passwords, private journals — and want control over their data rather than convenience at the cost of surveillance. Anyone looking to leave a big-tech notes app that mines their content will find it a natural home.

Key features

• End-to-end encryption across all devices
• App Lock with fingerprint, PIN or password
• Vault — a second password for your most sensitive notes
• Rich editor: tables, checklists, code blocks, math and markdown
• Linked (bidirectional) notes for connecting ideas
• Web Clipper that saves articles without ads or trackers
• Password-protected published notes and cross-device reminders
• Inbox API plus Zapier and IFTTT integrations

Privacy without giving up features

Notesnook's core promise is that you don't have to choose between security and usability. Many encrypted apps feel stripped-down; Notesnook offers a genuinely capable editor, linked notes, a web clipper and sync — the things people actually use — while keeping everything encrypted end to end. That balance is why it can realistically replace a mainstream notes app rather than just supplement one.

Extra locks for your most sensitive notes

Beyond baseline encryption, Notesnook layers on protection. App Lock guards the whole app with biometrics or a PIN, and the Vault adds a second password specifically for your highest-sensitivity notes — so even someone with access to your unlocked device can't open them. For medical, financial or credential notes, that extra barrier is exactly the reassurance mainstream apps don't provide.

Open, auditable and trusted

Because Notesnook is fully open source under GPLv3 with no tracking or telemetry, its privacy claims are verifiable rather than promised — the code is public and auditable, and the roadmap is developed transparently with community input. It's earned real trust too: 14,000+ GitHub stars, a 4.4 Play Store rating, and an endorsement from Privacy Guides, a respected privacy community.

Everywhere you are, connected to your tools

Notesnook syncs across Windows, macOS, Linux, Android, iOS and the web, so your encrypted notes follow you between every device without ever exposing their contents to the sync server. It also connects outward when you want it to: an Inbox API plus Zapier and IFTTT support let you pipe content into Notesnook automatically, and importers pull your history in from Evernote, Google Keep and Obsidian — so switching doesn't mean starting from an empty notebook.

Why choose Notesnook

For anyone who wants a capable notes app that treats privacy as the point rather than an afterthought, Notesnook is a leading choice. Its end-to-end encryption, extra vault and app locks, rich editor, open-source transparency and easy imports from Evernote, Google Keep and Obsidian make it a practical, trustworthy home for notes you'd rather keep to yourself.