The most secure diary,

in your browser.

Try the demo
Your entries are secured with 256-bit AES encryption before they leave your computer. Not even we can read your diary entries.
Military-grade encryption
We never see your password, and we never store it on our servers. Even if our servers get compromised your password will not be.
Zero-knowledge passwords
Open and edit your diary on any internet-connected device and we'll make sure all your devices stay in sync.
Cloud backup & sync
Your entries are automatically saved and backed up to our server multiple times per minute. Never lose anything.
Save-as-you-type
Need to edit an entry for a past or future date? No problem. You can even set the exact hour and minute.
Time-travel editing
Easily track down the entry you want using full-text keyword search and our visual navigation timeline.
Search and navigate

(Read our FAQ for more info)

Heartnotes works best inChrome and Firefox.

(Desktop apps are under development)

Start writing