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    SeedSigner:
    Next Level Bitcoin Security

    Download the Latest ReleaseGPG Pub KeyView the Project on GitHub
    Positioning SeedSigner for Maximum ImpactSeedSigner Independent Custody Guide
    The Freedom-First Philosophy Behind SeedSigner – BitcoinNews Interview

    Download for your platform

    Download for WindowsDownload for macOS
    Key Features

    Everything You Need for Sovereign Storage

    SeedSigner combines security, simplicity, and self-sovereignty in a DIY package that puts you in complete control of your Bitcoin.

    BIP39 Seed Management

    Generate or import 12/24-word seed phrases with dice roll entropy for maximum security.

    PSBT QR Signing

    Scan, review, and sign transactions using QR codes. No USB or network required.

    Air-Gapped Workflow

    Never connects to the internet. No WiFi, Bluetooth, or USB data transfer.

    Multisig Support

    Works seamlessly with Specter, Sparrow, Nunchuk, and other multisig coordinators.

    Watch-Only Wallets

    Export xpubs safely to create watch-only wallets in your favorite software.

    DIY Hardware

    Build with ~$50 in off-the-shelf parts. No proprietary components needed.

    Your Keys. Your Rules.

    SeedSigner is completely stateless — it never stores your seed phrases. Each time you use it, you import your seed via QR or manual entry. If the device is lost or destroyed, your backup remains your only copy.

    Simple Workflow

    How SeedSigner Works

    A streamlined four-step process that keeps your keys offline while enabling you to sign any Bitcoin transaction securely.

    01

    Generate or Import Seed

    Create a new seed with dice rolls for provable entropy, or import your existing 12/24-word BIP39 seed phrase via QR code or manual entry.

    Dice roll entropyQR importManual word entry
    02

    Create PSBT on Host

    Use your favorite wallet software (Sparrow, Specter, Nunchuk) to create an unsigned PSBT transaction on your networked device.

    Sparrow WalletSpecter DesktopNunchuk App
    03

    Scan, Review & Sign

    Scan the PSBT QR code with SeedSigner. Verify the transaction details on the device screen, then sign and export as a new QR.

    Visual verificationOffline signingQR export
    04

    Broadcast to Network

    Scan the signed PSBT back to your wallet software. Review once more and broadcast the transaction to the Bitcoin network.

    Return to walletFinal reviewNetwork broadcast

    Wallet Software

    Sparrow / Specter

    SeedSigner

    Air-Gapped Device

    Bitcoin Network

    Broadcast TX

    Get SeedSigner

    Download Firmware

    Get the latest SeedSigner firmware for your Raspberry Pi. Always verify checksums before flashing.

    Choose Your Platform

    Raspberry Pi ZeroRecommended
    Recommended for most users
    Pi Zero 2W
    Disable WiFi/BT after flash
    Build from Source
    For advanced users
    Release NotesView SourceHardware Guide

    Security Checklist

    Before you flash

    Verify SHA256 checksums before flashing
    Build from source for maximum trust
    Flash firmware on air-gapped machine (optional)
    Disable WiFi/Bluetooth if using Pi Zero 2W
    Never connect SeedSigner to the internet

    Verify SHA256 checksum:

    sha256sum seedsigner_0.x.x.img.zip
    Sign offline. Stay in control.
    Multi-sig friendly.
    Verify address on device.
    Your keys. Your rules.
    No WiFi. No Bluetooth.
    100% open source.
    Ecosystem

    Explore the SeedSigner Ecosystem

    From hardware builds to wallet integrations, discover everything you need to get started with SeedSigner.

    Hardware Build Guides

    Step-by-step instructions to build your own SeedSigner with off-the-shelf components.

    Community Forum

    Join discussions, ask questions, and connect with other SeedSigner users.

    GitHub Releases

    Access the latest firmware releases, changelogs, and source code.

    Documentation

    Comprehensive guides covering setup, usage, troubleshooting, and best practices.

    Partner Wallets

    Works with Sparrow, Specter, Nunchuk, BlueWallet, and other PSBT-compatible wallets.

    Ready to Build?

    Get started with ~$50 in parts and join thousands of Bitcoiners who trust SeedSigner.

    View Build Guide