About

Cryptocurrency transactions are immutable. Once funds are sent to an incorrect address - whether due to a simple typo, a clipboard malware attack, or a network mismatch - they are irretrievable. This tool serves as a critical Sanity Check layer before you execute any transfer.

Unlike simple regex matchers, this validator performs Deep Cryptographic Verification. It decodes the address payload, recalculates the checksum using the specific hashing algorithm of the blockchain (e.g., SHA-256 for Bitcoin, Keccak-256 for Ethereum), and verifies integrity. It also detects Testnet addresses to prevent the catastrophic error of sending real assets to a testing environment.

Formulas

Address validation is not just checking characters; it involves cryptographic recalculation. Below are the primary mechanisms used.

Bitcoin (Base58Check) Logic

To verify a legacy Bitcoin address, we reverse the encoding process to isolate the checksum:

{

Payload = Base58Decode(Address)Checksum_orig = Last 4 Bytes of PayloadHash = SHA256(SHA256(Payload_{without_checksum}))VALID ⇔ Hash_1..4 ≡ Checksum_orig

Ethereum (EIP-55) Checksum

Ethereum addresses use capitalization to encode a checksum within the hex string itself. The validation logic is defined as:

H = Keccak256(toLowerCase(Address_hex))

For the i-th character of the address addr_i:

{

uppercase if H_i ≥ 8lowercase otherwise

Reference Data

Asset	Symbol	Standard	Prefix / Format	Algorithm
Bitcoin	BTC	Base58 (P2PKH)	Starts with 1	SHA-256 Double
Bitcoin	BTC	Base58 (P2SH)	Starts with 3	SHA-256 Double
Bitcoin	BTC	Bech32 (SegWit)	Starts with bc1	Bech32 Modulo
Ethereum	ETH	Hexadecimal	Starts with 0x	Keccak-256 (EIP-55)
Ripple	XRP	Base58	Starts with r	SHA-256 Double
Litecoin	LTC	Base58	Starts with L or M	SHA-256 Double
Tron	TRX	Base58	Starts with T	SHA-256 Double
Solana	SOL	Base58	Length 32-44 chars	Ed25519 PubKey
Dogecoin	DOGE	Base58	Starts with D	SHA-256 Double
Polkadot	DOT	SS58	Starts with 1	Blake2b
Monero	XMR	Base58	Starts with 4 or 8	Keccak-256 (Var)

Frequently Asked Questions

Testnet addresses are valid formats but exist on a parallel network used for testing. They carry no real-world value. Sending real coins (Mainnet) to a Testnet address will result in the permanent loss of funds. This tool explicitly flags them to protect you.

Yes. All ERC-20 tokens (USDT, SHIB, LINK on Ethereum) use the same address format as Ethereum itself. Select "Ethereum" or let the auto-detector identify the "0x" prefix.

The Identicon is a unique geometric pattern generated from the hash of the address. It serves as a visual fingerprint. If the pattern looks different from what you expect (e.g., on your destination exchange), you may have pasted the wrong address.

NEVER paste a private key (starts with "5", "K", "L" for BTC or 64 hex chars) into any online tool. This tool is for PUBLIC addresses only. While all logic runs client-side, it is a critical security habit to keep keys offline.