Private Key to Address
Derive Bitcoin (P2PKH) and Ethereum (EIP-55) addresses from a 32-byte secp256k1 private key — all math runs locally in your browser
Private Key → Address
Derive Bitcoin (P2PKH) and Ethereum (EIP-55) addresses from a 32-byte secp256k1 private key
Public Key
Ethereum
Bitcoin
How it works
- •BTC and ETH both use the same secp256k1 curve, so a single 32-byte key derives addresses on both chains.
- •ETH address = last 20 bytes of
keccak256(pubkey_xy), then EIP-55 checksum casing. - •BTC P2PKH = base58check(
0x00 || RIPEMD160(SHA256(pubkey))). - •WIF (Wallet Import Format) is the base58check encoding of the private key for use in Bitcoin Core / Electrum.
Never paste a real private key controlling real funds into a website.
This tool computes everything locally with no network calls, but you cannot verify that with the naked eye. Use it only for testnet keys, learning, and burner wallets.
Powered by the audited @noble/curves and @noble/hashes libraries. Pure JavaScript, no WASM, no network.
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