A message to the future

Some messages deserve the right moment.

Seal a letter, photo or document into one encrypted file. The chosen date and password are both required to open it. No Untilum account is needed.

Open Web app All applications See the 90-second story

Web, Windows, Android and iOS testing builds are available. Keep control of your file and password.

UNTILUM WEBv0.1.0
message.uddp ENCRYPTED · PORTABLE
Contents
Encrypted locally
Opening
Date + password
Storage
Where you choose
Create in the browser →
  • Your file
  • Your password
  • Your choice of storage

What would you leave for later?

Untilum is for the things whose meaning comes from waiting—not from another cloud account.

For your future self

A letter about who you are today, opened on a date that matters.

For someone you love

Photos, a voice note or a story for a future birthday or anniversary.

For the next keeper

A family memory or document that should be revealed later—not forgotten in an inbox.

Why it is different

A file you own, not an account you depend on

Most services keep your memory inside their system. Untilum gives you the capsule itself: a portable UDDP file.

01

A file, not an account

Save it in Documents, copy it to a drive, or give an encrypted copy to family. The capsule is not a database record inside Untilum.

02

Time and password

Knowing the password is not enough before the date. After the date, the password is still required.

03

More than one home

Keep identical encrypted copies in independent places. One intact copy is enough to open later.

Three simple steps

Create it now. Let time decide when it opens.

  1. 1

    Choose

    Select a file, an opening date and a password. Use a password the future recipient can safely receive.

  2. 2

    Seal

    Encryption happens on your device. Untilum does not need your open file or password.

  3. 3

    Keep and open

    Save at least two copies. Once the date arrives, verify the capsule and open it locally with the password.

If Untilum disappears

The message should not disappear with the messenger.

The UDDP container includes the encrypted capsule, opening instructions and public format documents. It is designed so a compatible opener can be rebuilt without permission from Untilum.

The keeper may disappear. The message should remain.

This is a design goal, not a promise that a file will survive without care. You must preserve at least one intact copy and the password.

See the 90-second story →

Why Untilum exists

It began with a letter that could no longer be found.

A last letter remained somewhere in a home lost to war. Untilum began with a simple conviction: important words should not remain forever in a place their recipient can no longer reach.

Read the story behind Untilum →

Trust through evidence

Do not take our word for it.

Untilum exposes what can be checked and labels what is not ready. The format and protocol are public; the current consumer application is still early access and has not completed an external security audit.

01

Public format

Read how a UDDP capsule is formed and what an independent opener needs.

Open evidence →02

Local verification

The application checks capsule structure, date parameters and integrity before opening.

Open evidence →03

Honest status

No invented reviews, audit badge or app-store link. Current limitations stay visible before download.

Open evidence →
Read the public protocol Read the honest safety note

Free early access

Try the capsule before paying for preservation.

The current applications are free to test. A future managed-preservation service is planned as a one-time purchase—not a subscription—and will only be sold when its storage and checking work is actually available.

Available now

Applications

Free

Create, import, verify and open local UDDP capsules on Web, Windows, Android and iOS testing builds.

Download Untilum

Target price—not for sale

Letter preservation

Target €9.99 once

Proposed for a small capsule. Copy count, storage term, health checks and failure handling will be fixed and published before sale.

Target price—not for sale

Album preservation

Target €19.99 once

Proposed for a larger capsule. Final storage scope will be published before sale; opening will not depend on payment or an active account.

Untilum does not currently upload your capsule to a distributed copy network automatically. You choose and maintain storage locations yourself.

Make something worth meeting again.

Start with a test file and a short date. Learn where the UDDP file is saved, then create the message that matters.

Download UntilumRead the FAQ