Amulet

Offline BIP‑39 · BIP‑32 · In your browser · v1.58

Click for offline instructions

Built for long-term holders. A Bitcoin seed minted in your own room, on a machine you control, with no part you can't see. 256 bits from the browser's CSPRNG, optionally folded together with dice, cards, or keystrokes via SHA‑256. Reproducible to the byte if you ever want to check.

1Seed length

2Extra entropyOptional

Add your own randomness

Pick one source. Mixed into the seed via SHA‑256(csprng ‖ user_input) and logged in the report so you can recreate the seed offline.

▸

CSPRNG only

No extra input. The browser's cryptographic RNG (256 bits) is the sole source — this is cryptographically sufficient on its own.

Reproducible mode · optional. Ticking this lets your raw dice or card notes alone regenerate the wallet later.

Your backups already work without this. Every wallet made here can be reproduced from its seed phrase, or from the .txt / .pdf / .enc file it exports — anytime, via Verify wallet at the top of the page. Only tick this if you want the raw draws themselves to also count as a valid backup path. When ticked, the wallet's strength depends entirely on how well you shuffled or rolled.

Everything happens locally. Nothing leaves your browser.

Verify existing wallet

Check that a paper backup, an .enc file, or a set of entropy notes still yields the same wallet.

Type or paste your 12 or 24 words. Words are matched against the BIP‑39 English list, and the checksum is checked. Works for any wallet ever made by any tool.

BIP‑39 passphrase (optional)

Drop or pick a .enc or .txt file that this tool wrote for you. For an .enc, enter its password. For a PDF, open it, copy the twelve or twenty-four words, and paste them into the From seed phrase tab.

Drop a file here, or click to pick one

BIP‑39 passphrase (optional)

Replay the exact same SHA‑256 chain the Generator used, so a v1.52 wallet made with dice or cards + a random CSPRNG becomes reproducible when you have both parts on hand. For v1.53/v1.54 reproducible-mode wallets, leave the CSPRNG blank.

CSPRNG hex (64 characters, from the original .txt / .pdf / .enc report). Leave blank for a v1.53+ reproducible wallet.

Dice rolls (digits 1–6, in the same order as recorded)

Card draws. Any notation the tool wrote works: one round per line, packed with |, or the pretty #01 A♥ 7♠ K♦ T♣ form. Total = 23 rounds × 4 cards for a 24-word wallet, 11 rounds for a 12-word wallet.

BIP‑39 passphrase (optional)

✓ Wallet generated

Write this down on paper or steel, offline — anyone who reads these words can spend the funds. Never photograph it, screenshot it, type it in a search bar, or paste it into a website or chat.

1Seed phrase

2Seed fingerprint & SeedQR

Seed fingerprint

computing…

SHA-256 of the full BIP-39 seed (mnemonic plus passphrase). Record it with your backup: it identifies this wallet seed. It is not the Amulet Vault passphrase fingerprint, which checks a vault master password and is shown as a square grid, not this colour bar.

Show this seed as a SeedQR (advanced, air-gapped restore only)

What is a SeedQR? A SeedQR is your recovery seed encoded as a QR code, in the format created by the SeedSigner project, a build-it-yourself offline signing device. Instead of typing every seed word by hand, an offline signer can rebuild the wallet by scanning this code. Wallet software such as Sparrow Wallet can import a seed this way too. Open these links only on a normal, online device for reading, never on the air-gapped computer you use to generate seeds.

This QR code is your seed. Anyone who photographs or scans it can take your bitcoin. Scan it only with an offline signing device, such as a SeedSigner. Never point a phone camera or an internet-connected computer's webcam at it. Never screenshot it or save it to a photo library.

3Entropy quality

4Details

5Extended keys (BIP‑32)

Import the public keys into a watch‑only wallet (Sparrow, Electrum, BlueWallet, Nunchuk…) to monitor funds without exposing the seed. Private keys let you fully import the wallet and spend — handle with the same care as the seed.

I use a BIP‑39 passphrase for this wallet (advanced, rarely used)

Read this before typing anything here. A BIP‑39 passphrase (often called the “25th word”) is an optional secret mixed into the seed. The same 24 words with a different passphrase produce a completely different wallet, with completely different addresses. Most wallets do not use one. If you do not specifically want a passphrase, close this box and leave it empty.

BIP‑39 passphrase (optional 25th word)

This wallet's seed fingerprint: computing…

No passphrase set: this is the 24 words only.

Its colour bar is in section 2 (Seed fingerprint & SeedQR) above. After editing the passphrase, press Recompute to update it.

Verify on‑page

6Preview your first receive addresses

Try it: pick a wallet kind below and reveal the first three receive addresses instantly — so you can cross‑check them against Sparrow, Electrum, or any hardware wallet before you ever touch the network.

Derivation path m/purpose'/0'/0'/0/i. Computed locally from the seed and the passphrase above — no network calls.

Verify the checksum & reproduce the seed by hand

Download the wallet report

Choose what to save. The default gives you all three files, each as a separate download. Only the encrypted .enc file can be opened later in Amulet Scryer to watch this wallet's balance.

All three files .enc · .txt · .pdf Recommended. The encrypted backup plus both readable copies. Encrypted .enc Password protected, safe on a normal disk. This is the file Amulet Scryer reads. Plain text .txt The full report as readable text. PDF document .pdf Printable, with a SeedQR page for paper backup.

The .txt and .pdf hold your seed in the clear, exactly like writing it on paper, and the PDF SeedQR is itself a scannable seed. Keep those files offline. The .enc file is encrypted with a password you choose.

Done copying everything to paper or steel? Scrub this browser tab.

Amulet

CSPRNG only

🎲 Dice rolls · D6, values 1–6

🃏 Playing cards · one 52‑card deck, no jokers

⌨️ Random keystrokes · analysed live

🌀 Chaos Grid · flip tiles, break symbols

Verify existing wallet

📶 You appear to be ONLINE

🛡️ How to use this page offline

Amulet

CSPRNG only

🎲 Dice rolls · D6, values 1–6

🃏 Playing cards · one 52‑card deck, no jokers

⌨️ Random keystrokes · analysed live

🌀 Chaos Grid · flip tiles, break symbols

Verify existing wallet

🔒 Encrypt report

🔓 Decrypt report