About

True Bitcoin self-sovereignty.

A Swiss Army knife for Bitcoin. Download it, verify it, and run it offline on your own machine — and it keeps working even if this website disappears. Complete, private, reproducible control over your Bitcoin: no expensive hardware, no third parties, no subscriptions.

You hold your value the way Bitcoin was meant to be held: offline, unseen by anyone else, and recoverable on your own terms — even decades later.

Everything offline except the broadcast.

Generate your own randomness — even by shuffling a deck of playing cards — then run the rest on an offline machine. Only the final step touches the internet.

  1. 1Generate entropyRoll dice or draw from a deck of cards — randomness you can see and reproduce.
  2. 2Create a walletTurn that entropy into a seed and addresses, fully offline.
  3. 3Encrypt & back upSave it — plain or strongly encrypted — to paper, a USB stick, or hidden in plain sight.
  4. 4Build & sign transactionsConstruct and sign PSBTs on the air-gapped machine.
  5. 5BroadcastPush the signed transaction to the network — the only step that needs to be online.

Steps 1–4 never touch the internet. Your keys are created, stored, and used entirely offline.

Meet Melissa

Starting from zero

Long-term Bitcoin, no companies involved.

Melissa wanted to secure her Bitcoin for the long term without trusting companies, hardware vendors, or complex setups — and she wasn't about to pay €300+ for a "black box" wallet she barely understood.

Instead, she shuffled an ordinary deck of cards to generate her own high-quality entropy, created a wallet seed completely offline, and saved the encrypted result to a file she can keep anywhere — on paper, a USB stick, or hidden in plain sight. Because her method is fully reproducible, she can always regenerate the exact same wallet.

No exchange, no wallet company, no network ever saw her keys or her funds. No remote hacks, no supply-chain risk, no firmware to brick. Her Bitcoin is set-and-forget — ready to hold for decades or pass to her children, with a recovery process that depends only on her and a deck of cards.

This is what real self-sovereignty feels like: calm, simple, permanent. Low-tech on purpose.

Bringing old coins forward

A real use case

Dormant legacy coins, spent privately.

Many people still hold small amounts of Bitcoin in old wallets. Moving those funds without leaking privacy has always been hard.

With these tools, you can import the UTXOs from an old wallet in a fully air-gapped environment, then spend them straight into a silent payment — to a recipient who never has to publish a reusable address. No address reuse, no public link between sender and receiver. Everything stays offline until the signed transaction is ready to broadcast.

Dormant or exposed legacy coins become modern, private holdings — without ever breaking the air gap or relying on a third-party coordinator.

What you actually get

Whether you start from zero or bring old coins forward, the outcome stays the same.

True buy-and-hold Bitcoin: private, portable, inheritable on your terms. Your keys, your coins, your rules.

About the creator

I'm "mr 21" — 20+ years in testing, tech and telecom.

I'm a Bitcoiner who got tired of watching tools turn bloated, commercial, and stuffed with software standing between people and their money. Today you buy an expensive hardware wallet, install its companion apps, and somehow end up with less privacy and less sovereignty.

You don't need any of it. With a pencil, paper, a few dice or a deck of cards, and a web browser on an offline machine, you can play "hardware wallet" yourself — no corporations, no untested firmware, no supply-chain risk.