This directory documents the extra features this fork adds on top of stock SeedSigner, with a focus on smartcards, plus the quick-start guides most users need and documentation for building, developing and assembling your own hardware.

New to the smartcard features? Start with the applet reference to decide what to install, then the relevant quick start below.

Quick starts

Guide What it walks you through
01 – Install applets on DIY JavaCards Preparing a card and flashing SeedKeeper (and friends)
02 – Mnemonic to a SeedKeeper Create a seed, save it, load it back
03 – Multisig descriptor to a SeedKeeper Load, save and reload a descriptor
04 – Initialise a Satochip with a seed Seed a Satochip and export an xpub
05 – Password generator to a SeedKeeper Generate a password and store it on a card
06 – First-time DIY card setup GlobalPlatform keys and locking a card
07 – SLIP-39 backup Split and store SLIP-39 shares
08 – BIP85 child seed Derive a child wallet from a parent
09 – SeedQR backup Transcribe a seed to a SeedQR
10 – Flash a MicroSD card Flash and verify a SeedSigner image in-app

Feature reference

Smartcards

Seeds and backups

Tools

Hardware

Building and development

SeedSigner OS documentation

The operating system that runs on SeedSigner devices lives in the separate seedsigner-os repository. Its docs are mirrored into this site at build time, pinned to the same OS commit this release is built against. They cover how OS images are built, verified and hardened — useful for users flashing or reproducing official images, and for OS development as a secondary focus.

Released under the MIT License. The SeedSigner OS section is mirrored from the seedsigner-os repository at the pinned release commit.

This site uses Just the Docs, a documentation theme for Jekyll.