FreeTool
Sécurité

Clé Privée vers Adresse

Dérivez des adresses Bitcoin (P2PKH) et Ethereum (EIP-55) à partir d'une clé privée secp256k1 de 32 octets — tous les calculs s'exécutent localement

Private Key → Address

Derive Bitcoin (P2PKH) and Ethereum (EIP-55) addresses from a 32-byte secp256k1 private key

Public Key

0214b70244e798c95877b87f68c5797665ac5e9228bde913ed4bc4dd35d68448bc
0414b70244e798c95877b87f68c5797665ac5e9228bde913ed4bc4dd35d68448bc21ad109031efce2cbaf39574673ca206f4de201fe85c14192f80172abc079612

Ethereum

0xB73e0cc5cF001705c5B9a51Da3a326483007B798

Bitcoin

16DBaY7TDSK2HnRwGWkCqkPnp6CqyN5B2W
Kxr41Fk1fRZQyEcYSXjnTqaeAzxkebDD9ENpTmRT1gxKQ6FpjsYo
5JBfHpkH1Yr2oj44xB8t5ipVp8EzU6V9BvnGjmW6tp7eFP5RmmJ

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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