What is Sealed Forever?

We write your letter, word for word, into a Bitcoin transaction — the most permanent public record there is. You get a page to share, and proof on the blockchain that anyone can check.

Do I need a crypto wallet, or to know anything about Bitcoin?

No. You pay by card and we handle the chain entirely. You never touch a wallet, an exchange, or a seed phrase.

Who can read my letter?

Anyone. A letter written into Bitcoin is public by nature — that is what makes it permanent and verifiable. Write it as something you would be glad to have found, not as a secret.

Can it be edited or deleted later?

No, and that is the point. Once inscribed, your letter is carried by thousands of independent computers around the world. Nobody can alter or remove it — not us, not you.

What if I make a mistake?

Check it before you pay. You write and preview your letter first, and nothing is sent to the blockchain until the payment goes through. After that a typo is permanent, so take the extra minute.

How long does it take?

The transaction is broadcast within a minute or so of paying, and your shareable page works straight away. It is usually written into a block within the hour.

Say it once. Keep it forever.

A love letter written into the Bitcoin blockchain. Readable by anyone, erasable by no one.

Write your letter · $10 This is a real letter, inscribed in transaction 5e0098…a613e8

Dear Ada,

Ten years ago you said yes on a rainy Tuesday. Every day since has quietly confirmed it was the best thing I ever asked.

Forever yours,
Robert

44 65 61 72 20 41 64 61 2c 0a 0a 54 65 6e 20 79 65 61 72 73 20 61 67 6f 20 79 6f 75 20 73 61 69 64 20 79 65 73 20 6f 6e 20 61 20 72 61 69 6e 79 20 54 75 65 73 64 61 79 2e 20 45 76 65 72 79 20 64 61 79 20 73 69 6e 63 65 20 68 61 73 20 71 75 69 65 74 6c 79 20 63 6f 6e 66 69 72 6d 65 64 20 69 74 20 77 61 73 20 74 68 65 20 62 65 73 74 20 74 68 69 6e 67 20 49 20 65 76 65 72 20 61 73 6b 65 64 2e 0a 0a 46 6f 72 65 76 65 72 20 79 6f 75 72 73 2c 0a 52 6f 62 65 72 74

Bitcoin transaction

Transaction ID

5e0098993e71ed82be2d436a432d5067afaa4cd8240862adf020d42f69a613e8

OP_RETURN 120 bytes

Inscribed: Aug 21, 2026
Block: 963,419

Your words.
Up to 300 characters, on the card you choose, in the hand you choose.
Become bytes.
Every letter, space and comma is encoded exactly as you wrote it. Nothing is summarised, compressed or left out.
Dear Ada,
Ten years ago you said yes on a rainy Tuesday. Every day since has quietly confirmed it was the best thing I ever asked.
Forever yours,
Robert
44 65 61 72 20 41 64 61 2c 0a 0a 54 65 6e 20 79 65 61 72 73 20 61 67 6f 20 79 6f 75 20 73 61 69 64 20 79 65 73 20 6f 6e 20 61 20 72 61 69 6e 79 20 54 75 65 73 64 61 79 2e 20 45 76 65 72 79 20 64 61 79 20 73 69 6e 63 65 20 68 61 73 20 71 75 69 65 74 6c 79 20 63 6f 6e 66 69 72 6d 65 64 20 69 74 20 77 61 73 20 74 68 65 20 62 65 73 74 20 74 68 69 6e 67 20 49 20 65 76 65 72 20 61 73 6b 65 64 2e 0a 0a 46 6f 72 65 76 65 72 20 79 6f 75 72 73 2c 0a 52 6f 62 65 72 74
120 bytes, exactly as written.
Written into Bitcoin.
We put those bytes inside a Bitcoin transaction and pay the network to record it. You pay by card — no wallet, no crypto.
Bitcoin transaction
Transaction ID
5e0098993e71ed82be2d436a432d5067afaa4cd8240862adf020d42f69a613e8
OP_RETURN 120 bytes
44 65 61 72 20 41 64 61 2c 0a 0a 54 65 6e 20 79 65 61 72 73 20 61 67 6f 20 79 6f 75 20 73 61 69 64 20 79 65 73 20 6f 6e 20 61 20 72 61 69 6e 79 20 54 75 65 73 64 61 79 2e 20 45 76 65 72 79 20 64 61 79 20 73 69 6e 63 65 20 68 61 73 20 71 75 69 65 74 6c 79 20 63 6f 6e 66 69 72 6d 65 64 20 69 74 20 77 61 73 20 74 68 65 20 62 65 73 74 20 74 68 69 6e 67 20 49 20 65 76 65 72 20 61 73 6b 65 64 2e 0a 0a 46 6f 72 65 76 65 72 20 79 6f 75 72 73 2c 0a 52 6f 62 65 72 74
Inscribed
Aug 21, 2026
Block
963,419
Confirmed every ten minutes. Forever.
Each new block is built on the one that holds your letter, and tens of thousands of computers around the world keep a copy.
1. This letterBlock 963,419
2. 963,420
3. 963,421
4. 963,422
5. 963,423
12,024
blocks built on top of it, and counting.

How a letter gets onto the blockchain

Read what people have sealed.

All letters

$10. Once. Forever.

No wallet.: Pay by card, like anything else. The Bitcoin side is ours to handle.
On the chain in minutes.: Your letter goes to the network as soon as the payment clears, and is sealed in a block soon after.
Yours to share.: A page of its own, a link, and a QR code for a card or a frame.

Questions people ask

Every question, answered

What is Sealed Forever?: We write your letter, word for word, into a Bitcoin transaction — the most permanent public record there is. You get a page to share, and proof on the blockchain that anyone can check.
Do I need a crypto wallet, or to know anything about Bitcoin?: No. You pay by card and we handle the chain entirely. You never touch a wallet, an exchange, or a seed phrase.
Who can read my letter?: Anyone. A letter written into Bitcoin is public by nature — that is what makes it permanent and verifiable. Write it as something you would be glad to have found, not as a secret.
Can it be edited or deleted later?: No, and that is the point. Once inscribed, your letter is carried by thousands of independent computers around the world. Nobody can alter or remove it — not us, not you.
What if I make a mistake?: Check it before you pay. You write and preview your letter first, and nothing is sent to the blockchain until the payment goes through. After that a typo is permanent, so take the extra minute.
How long does it take?: The transaction is broadcast within a minute or so of paying, and your shareable page works straight away. It is usually written into a block within the hour.

Readable in 100 years.

Write your letter — $10

Not today?

Say it once. Keep it forever.

How it works

Your words.

Become bytes.

Written into Bitcoin.

Confirmed every ten minutes. Forever.

Read what people have sealed.

$10. Once. Forever.

Questions people ask

Readable in 100 years.