01
Choose your phrase strength
More words means more entropy — and more dice rolls. 24 words is the standard for long-term cold storage; 12 words is common for everyday wallets.
02
Before you roll
- Disconnect from the internet, or better — open this page, then switch to airplane mode.
- Use a real, physical d20. Not a dice-rolling app, not a random number website.
- Make sure no one can see your screen or your rolls.
- Have paper and a pen ready. The phrase is for writing down, not for copying and pasting.
03
Roll and enter
Roll the die, then tap the number that comes up. One roll at a time, in order.
Roll 1 of 30
04
Your seed phrase
Write each word down, in order, on paper. Do not photograph, screenshot, type into a password manager, or send this anywhere.
Verify the math (advanced)
You can cross-check this against any independent offline BIP-39 tool using the raw entropy below.
Entropy (hex)
—Checksum bits
—
05
Confirm your backup
Type the words back in from your paper copy, in order, to make sure nothing was misheard or miswritten.
06
Close it out
- Close this browser tab. Nothing was saved — reloading starts over from zero.
- Store the paper somewhere fire-safe and private. Consider a second copy in a separate location.
- Import into your wallet software to confirm it works before funding it.
- If this device ever touched the internet during this process, treat the phrase as higher-risk and consider regenerating on a truly offline machine.