OfflineSeeds

Create and print a repeatable card-to-word lookup.

Reuse a code to make the same PDF.

New codes mix independent sources.

The browser uses Web Crypto and available bytes from RANDOM.ORG and drand. It requires at least one network source and mixes the bytes with SHA-256.

Do not enter a wallet recovery phrase as a shuffle code.

Make the first 23 words

Use the printed PDF and a shuffled deck. An offline wallet adds entropy and the checksum for word 24.

  1. 1

    Save or print the PDF. Keep all 13 pages together. Choose Letter paper and 100% scale.

  2. 2

    Draw one pair. Put all 52 cards in the deck and shuffle well. Deal two cards face up without replacement.

  3. 3

    Read one word. Find the first card in the large box at the left. Find the second card in that row. If the pair has a dash, return the cards, shuffle the full deck, and try again. Otherwise, record the word.

  4. 4

    Shuffle again for each word. Return all cards to the deck before each draw. Do not reject a pair only because its suits match. Stop after you record 23 words.

All 2,048 words can occur.

Each word has one accepted card pair. A blank pair is a retry. This keeps all accepted words equally likely when the deck is well shuffled before each word.

Use a compatible offline wallet for word 24.

Record 23 words. The wallet must generate the final 3 entropy bits and calculate the 8-bit checksum. Do not pick word 24 from this table.

Read the BIP39 specification

Printable PDF

Use these 13 Letter pages during card draws. The live map above is only a quick check. Page 1 is shown below as a preview.

Select “Save as PDF” in the print window.

Generating the PDF…