Free, open-source tools for Bitcoin and crypto enthusiasts. All processing is done in your browser – no data is sent to the server.
Convert any text (brainwallet) to private key, generate BTC (compressed/uncompressed) and ETH addresses, and check balances via Mempool.space (fallback to Blockchain.info).
NEWConvert between raw private key (hex) and Wallet Import Format (WIF). Supports both compressed and uncompressed formats.
Enter 12 or 24 BIP39 words to generate the seed (hex) and master private key. Useful for wallet recovery.
From a single private key, generate addresses for Bitcoin (P2PKH, P2SH, Bech32, Taproot), Ethereum, Solana, and Tron.
NEWValidate if a string is a valid Base58 (Bitcoin address) or Base64 encoded value. Quick sanity check for addresses.
Paste a raw Bitcoin transaction hex and decode it to see inputs, outputs, amounts, fees, and locktime.
Get real-time recommended Bitcoin transaction fees (slow, medium, fast) directly from Mempool.space API.