In active development

Monero SeedSigner

An offline, airgapped Monero signing device you can build yourself from inexpensive, off-the-shelf parts.

What is it?

A hardware signer that keeps your Monero keys off any connected machine.

Monero SeedSigner is a fork of SeedSigner that runs on the very same hardware, with the Bitcoin features removed and Monero support put in their place. It generates and stores seeds entirely offline, on a device that has no radios and never touches the internet.

Everything the device needs comes in by scanning a QR code, and everything it produces goes back out as a QR code. Nothing else goes in or out.

How it keeps keys safe

Stateless and airgapped by design.

🔌

Nothing persists

Seeds live in memory only while the device has power. Pull the plug and everything is wiped.

💾

Removable SD

The SD card can be removed after boot, so no secret data is ever written to it.

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No radios

No WiFi and no Bluetooth hardware onboard — there is no wireless path in or out.

📷

QR-only I/O

Data comes in only by scanning QR codes with the camera, and leaves only on the screen.

Seed features

Full Monero seed handling, on-device.

25-word Monero seeds and 16-word Polyseeds.
Create a seed from dice rolls or from camera-image entropy.
Enter an existing seed with the on-device word-entry keyboard.
Back up as words, with a word-by-word backup check.
Back up as a Monero SeedQR (standard or compact), with a guided transcription view and a scan-to-confirm step. SeedQRs are type-tagged so they are never mistaken for another format.
Show the primary address, as text and as a QR code.

Project status

Early, and moving.

Seed creation, entry, backup and verification all work today. Transaction signing is not implemented yet — that is the next major piece.

The plan is for the device to act as the offline half of Feather Wallet‘s airgapped transaction-signing flow.

Hardware

The same inexpensive parts as SeedSigner — enclosure designs fit as-is.

Compute

Raspberry Pi Zero v1.3 (or Pi Zero W with radios disabled)

Display

Waveshare 1.3″ 240×240 LCD hat

Camera

Raspberry Pi Zero camera (OV5647)

Storage

MicroSD card (removable after boot)

⚡ Free & fully open source

Built on SeedSigner · MIT licensed · Monero SeedSigner is an independent project and is not affiliated with the Monero or SeedSigner projects.

The full source code will be published openly. Check back as development continues.