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Backup your
wallet passphrase

durable and secure

What is Phrasekeeper?

With the Phrasekeeper you're able to stamp your wallet passphrase or a private key into a plate made of 99% copper to keep it durable against most common environmental influences like water or fire.

Why copper?

We tried to keep costs as low and quality as high as possible, therefore copper is smooth enough to easily stamp it, but hard enough for everything else.

The melting point of copper is at about 1085°C (1985°F). A standard house fire will reach a top temperature of about 1000°C (1832°F). So if you don't plan to place your Phrasekeeper near a pyrotechnics factory, everything should be fine, even in worst case.

And copper looks damn sexy!

Compatible with

Phrasekeeper is compatible with a broad variety of hardware and software wallets.

Some examples:

  • Ledger
  • Trezor
  • Coolwallet
  • KeepKey
  • Coinomi
  • Exodus
  • And many more Hardware and Software Wallets!

What's in the package?

There are several packages we will offer:

  • Phrasekeeper Passphrase Edition
    + Punching Letter Set
    + Steel Base Plate
  • Phrasekeeper Private Key Edition
    + Punching Letter Set
    + Punching Number Set
    + Punching Dot
    + Steel Base Plate
  • Phrasekeeper Passphrase Edition
  • Phrasekeeper Private Key Edition
  • Phrasekeeper Passphrase or Private Key Table Plate only


Martin Gauer, Founder of Phrasekeeper

mail at