Time Capsule.

Lock a message to the future. Timelock encryption using public randomness from the drand network – your secrets stay local and only unlock once the network reaches your chosen time.

Message

Unlock after

Advanced timing details

Local time: —

Manual Unix timestamp (seconds, optional) Use manual Unix timestamp instead of the picker

This tool contacts the public drand network to fetch randomness beacons only. Your message and keys never leave your browser.

How Timelock Encryption Works

This tool uses the drand distributed randomness network. Your message is encrypted against a future randomness beacon that doesn't exist yet. The drand network produces a new beacon every 3 seconds — once it reaches your chosen round, the decryption key becomes publicly available. No single party can decrypt early because the randomness is collectively generated by independent nodes worldwide.