Validators & Security

Ethereum, Bitcoin address validators and BIP39 seed phrase checker.

3 toolsin Web3 & Crypto
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Ethereum Address Validator

Validate ETH addresses with full EIP-55 checksum verification — 100% in your browser.

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Bitcoin Address Validator

Validate BTC addresses — Legacy (P2PKH), SegWit (P2SH), and Bech32 (Native SegWit + Taproot).

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BIP39 Seed Phrase Validator

Check recovery phrases word-by-word against the BIP39 wordlist and verify the checksum.

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Blockchain Address and Seed Validators

Blockchain validators check the validity of wallet addresses and recovery phrases before you send funds. Using the wrong address format or mistyping a seed word can result in permanently lost cryptocurrency.

Our validators support multiple address formats for Bitcoin (Legacy, SegWit, Taproot) and Ethereum (EIP-55 checksum). The BIP39 validator checks recovery phrases against the official wordlist.

These tools run entirely in your browser. Your addresses and seed phrases are never transmitted to any server, making them safe for verification before important transactions.

Frequently Asked Questions