Privacy

The key stays here.

Updated 26 October 2026. Byfiat doesn’t run an account server, and it doesn’t sell a profile of you.

On this computer

The account address, each private key, and any recovery words are stored in a file on this computer. The wallet page loads the balance and the address. The keys and the words stay in that file until you open Your key and choose Show.

Show puts them on this page so you can write them down. Close the window and they’re cleared from the page. Copy puts one of them on the clipboard, which is still this computer. Don’t leave it there.

The payment network

Sends, balances, and recent activity are public on the network. That includes your address, the amount, and a note if you added one. Anyone who knows the address can look that up. We ask the network for your account so the card can update.

Deposit and withdraw

Those screens load Fonbnk inside the wallet. What you type there — email, phone, local amount — goes to Fonbnk under their privacy policy, not into the Byfiat file. A deposit also sends them this wallet’s address so the USDC has somewhere to land.

Fonts and the installed app

The typefaces load from Google. The installed app keeps the pages, the stylesheet, and the icons on this device so the next open is faster. It does not keep the key, and it does not keep your balance.

What we don’t collect

No ad profile. No Byfiat login. No analytics account. If this computer is shared, anyone who can open the wallet can open the key. Lock the computer.