Devio Signer

EIP-191 · personal_sign

Sign an arbitrary message to prove you control a wallet. Paste the exact text someone asked you to sign, hit Sign, copy the result.

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Free & safe. This is a message signature — not a transaction. No gas, no funds move, nothing gets approved. It only proves "this wallet signed this text."
Message to sign
✓ Signature

How to use

  1. Connect your wallet — works with Coinbase Wallet MetaMask Rabby + more.
  2. Paste the exact message you were given.
  3. Sign — approve the prompt in your wallet.
  4. Copy the 0x… signature and send it back.

On mobile: open this page inside your wallet's built-in browser (Coinbase Wallet → browser tab, or MetaMask → browser). No PC needed.