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End-to-end encrypted Markdown notes

Notes only you can read.

Cappa encrypts every note on your device before it syncs. Write in Markdown, link your ideas and pick up where you left off on any device, while the server only ever holds ciphertext.

A capybara in reading glasses, a towel and a yuzu on its head, works on a laptop on a floating tray in a steaming hot spring, a padlock tied to the tray like a rubber duck
Try the demoThe full app with sample notes, right in this tab. No account, and your notes stay in your browser.Read the blogPlain-language guides to encryption, passwords and Markdown.

The server stores your notes but cannot read them

Flip the switch to see the same note twice: as you write it, and as it is stored for sync. Your master password and the key that opens your notes stay in the browser.

Showing the note as it reads on your device.

# Lisbon, day twoTram 28 before 9, then **pastéis** at Manteigaria.- [x] Book the Sintra train- [ ] Ask Ana about the fado barLinked: [[Trip budget]] #travel

Illustration. Each note is encrypted in your browser with AES-256-GCM. The server stores and syncs the ciphertext and never receives your master password or the key that decrypts your notes.

What the app does

Live Markdown

Formatting appears as you type. Markdown symbols show only where you are editing.

Works offline

Installs like an app on desktop, tablet and phone. Once a vault is on a device, it opens without a connection.

32 themes

Catppuccin, Nord, Rosé Pine, Gruvbox and more, light or dark.

Bring your notes

Import from Obsidian or Bear. Export plain Markdown any time.

Open by invitation for now

The planned price is €29 per year. Leave your email and we will tell you when access opens. Joining is free and does not commit you to buy.

We use your address only to tell you when Cappa opens. The link in the email removes it at any time. Privacy policy

Opening Cappa

Checking the encrypted local vault…