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ZERO-KNOWLEDGE · AES-GCM-256

Your secrets,
sealed.

LockTime encrypts everything in your browser before it leaves. We store ciphertext. Only you hold the key.

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AES-GCM-256PBKDF2 · 600kClient-side only
LIVE DEMO · TIME CAPSULE
LockTime · capsule
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Year-End Message
From: you@example.com
SEALED
Sealed until December 31 2026
Unseals in
243
d
:
03
h
:
24
m
:
45
s
encrypted payload
████████████████
██████████
████████████████████
contents encrypted · zero-knowledge
SCENARIOS

Six reasons to seal.

Dead man's switch
Your family finds everything.
Seal your passwords, accounts, and instructions into a time capsule. If you don't check in, it unseals automatically. The one thing you can't forget to do.
Cryptographic time-lock
The announcement you can't take back.
Seal your product launch, resignation, or confession. No one — including you — can open it before the clock runs out. Not even us.
One-time envelope
The credential that burns itself.
Share a secret link that self-destructs after the first view. No email threads with passwords. No Slack messages you forget to delete.
Timed delivery
The role handoff with no loose ends.
Seal server credentials, runbooks, and API keys to deliver exactly when your replacement starts. Nothing early. Nothing lost.
Encrypted keychain
The inheritance worth leaving.
Crypto seed phrases, bank logins, software licenses. Sealed in AES-GCM-256 and unlockable only by the people you choose, when you say so.
Zero-knowledge timestamp
Proof you can't backdate.
Seal a document, idea, or agreement today. The cryptographic seal proves it existed at that moment. Courts, clients, and co-founders will believe you.
HOW IT WORKS

Three steps to sealed.

01
Set a master password
Chosen by you, never transmitted or stored. It derives your encryption key entirely in-browser using PBKDF2.
02
Add your secrets
Everything is encrypted with AES-GCM-256 before it leaves your device. The server only ever receives ciphertext.
03
Access anywhere
Your encrypted vault syncs to the cloud. Unlock from any device. Only you can read the contents.
SECURITY

Nothing to trust us on.

Encryption happens entirely in your browser. We have no mathematical ability to decrypt your vault — our servers only store opaque ciphertext.

CipherAES-GCM-256
Key derivationPBKDF2 · 600,000 iterations · SHA-256
AuthClerk · OpenID Connect
StorageVercel Blob — server stores ciphertext only
ClientOpen-source · auditable
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Seal your first secret.

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