Write it now.
Open it when the time comes.
Pendnote lets you encrypt letters, predictions, promises, and messages into capsules that cannot be opened — not even by us — until the date you chose arrives.
Six ways to seal a thought
Every capsule is encrypted. Every capsule stays locked until the unlock date you choose. What changes is the shape of the note inside.
Letter
A message to your future self
Prediction
Test your foresight — see how right you were
Decision
Document a choice and review it later
Promise
A commitment you want to keep
Time Capsule
A message for someone special, delivered in the future
Legacy
Messages to be delivered years from now
How it works
Write it down
Pick a mode, write your thought, set the unlock date.
It gets sealed
Content is encrypted with AES-256-GCM. The server can't read it while locked.
It opens in time
On the date you chose, the capsule unlocks. We email you.
Your thoughts are yours.
Default mode encrypts with a server-side key — we hold it only so we can unlock your capsule when the time comes. For the most sensitive thoughts, switch to Zero-Knowledge mode: you set a passphrase, and not even Pendnote can read the content. Ever.
Create capsuleSimple pricing
Free tier covers the basics. Premium unlocks everything.