UD Time Capsule
Free · 1/monthSeal any message or document with a future unlock date. A letter to your children. A business plan. A message to your future self. The file shows a countdown until the date you chose — then the content is revealed.
What to put in a time capsule
A message that opens on their 18th birthday, graduation, or wedding day.
Seal your vision before you launch. Open it in 5 years to see how things evolved.
Questions, goals, and predictions for yourself. A digital letter you can't open early.
Seal your predictions or data before an experiment. Tamper-evident seal it existed first.
How UD Time Capsule differs
Traditional time capsules depend on physical storage or platforms that might not exist when the unlock date arrives. UD stores the proof inside the file.
No tamper evidence. Can be intercepted, modified, or cancelled by the sender before delivery.
Can be lost, destroyed, or opened early. No cryptographic proof of original content.
Platform-dependent. If the company closes, your capsule is gone. You depend on their infrastructure.
Proof lives in the file. Verifiable forever. No platform dependency. The .uds file is self-contained — share it anywhere.