bip39split

Tool to create fragmented paper backup of your bip39 mnemonic phrase.
This tool uses secret sharing for distributing your mnemonic phrase into cryptographically-secure pieces.
Then you save the pieces in different places and to reconstruct the original, combine a specific number of pieces.

Online Version

Not recommended for safety reasons, be careful
bit39split.com

Standalone offline version

Recommended use
Never use bip39split tool on a computer connected to internet

• Create a bootable ubuntu usb stick
• Copy bip39split.html on another usb key
• Boot Live ubuntu and run bip39split.html

Build local

npm install  
npm run compileBip39Lib  
npm run dist

Credits

Inspired by

• Some features of Bitcoin Armory - github
  • Fragmented Backups
  • Secure Print
• passguardian.com - github

Powered by

• bip39 for Mnemonic validation and conversion
• secrets.js for split and restore
• qrcodegen.js for QR code generator
• instascan for QR code reader
• mustache for templating
• spectre.css for styling
• sjcl

Donations

If you find this project useful, please make a small donation to keep this project healthy.

Coin	Address	QR Code
Bitcoin BTC	33bWirMx4k2VXTxreLJFdWXgJE7buxMfAR
Ethereum ETH	0x408c70e0C125894854700B23Cc8E5a9e7a3908ae
XRP	rDaEQkutXT7oXGnnqdnsKbZXN5zpHBwUA9

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Cross-browser testing provided by: