How it works
DotJamr is designed for sharing something once, then letting it disappear. Create → share → open → gone.
1) Write your message
Type a short message (up to 200 characters), choose an expiry time, and pick how you want to protect it: Link mode or Keyword mode.
2) Your browser encrypts it
Encryption happens in your browser before anything is sent to the server. The server stores only encrypted data. In Keyword mode, the encryption key is derived from your keyword, and the server never receives it.
3) Share the link
In Link mode, the link includes a token (to find the encrypted message) and a decryption key stored only in the URL fragment. Anyone with the full link can open it.
In Keyword mode, you share the link and the keyword separately. The link finds the encrypted message, and the keyword unlocks it.
4) Open once
When the link is opened successfully, the message is decrypted in the recipient’s browser and then deleted immediately. In Keyword mode, the recipient must enter the correct keyword to view it.
5) Expiry
If the link is never opened, it expires automatically. After expiry, the message is treated as unavailable.
Tips
- Use shorter expiry times for sensitive details
- Use Keyword mode for an extra layer, and share the keyword in a different channel
- In Link mode, assume anyone with the full link can open it first