SHA Hash Calculator
SHA-1 / SHA-256 / SHA-384 / SHA-512 hash calculation based on browser Web Crypto API, runs purely in frontend.
256 bits / 64 hexadecimal characters
SHA-256 (64 hexadecimal characters)
FAQ
Which is more secure, SHA-1 or SHA-256?
SHA-256 is more secure. SHA-1 produces a 160-bit hash value and has been proven vulnerable to collision attacks (SHAttered attack). Google demonstrated the first SHA-1 collision in 2017. SHA-256 produces a 256-bit hash value and remains secure today, widely used in TLS certificates, blockchain, digital signatures, and other applications. We recommend always using SHA-256 or stronger algorithms.
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