Generate SHA-512 hashes from any text using the browser's native Web Crypto API. Produces a 512-bit (128 hex character) hash — the strongest SHA-2 algorithm for maximum security requirements.
Type or paste the text you want to hash. SHA-512 is computed using your browser's native Web Crypto API. The hash updates automatically as you type. Input size has no practical limit.
The SHA-512 output is a 128-character hexadecimal string (512 bits). Toggle to Base64 for a shorter 88-character representation. Both represent the same hash value.
Copy the hash with one click. Use the Verify tab to compare your hash against a known SHA-512 value — useful for verifying high-security file downloads, firmware images, and cryptographic key material.
SHA-512 is the 512-bit variant of the SHA-2 family, producing a 128 hexadecimal character hash. Use SHA-512 when maximum hash strength is required: security-sensitive file integrity (firmware, OS images, cryptographic keys), long-term archival where collision resistance must be future-proof, compliance environments requiring 512-bit hashes (some government standards), and password-based key derivation where the extra output length is useful.
SHA-512 provides a larger output space (2⁵¹² vs 2²⁵⁶ possible hashes) which offers greater theoretical security margin against future attacks. In practice, both SHA-256 and SHA-512 are considered secure against all known attacks as of 2024. SHA-512 may actually be faster than SHA-256 on 64-bit processors because its internal operations work natively on 64-bit words.
SHA-512/256 is a truncated variant of SHA-512 that uses SHA-512's stronger internal state but outputs only 256 bits. It provides better security than SHA-256 against length extension attacks while being faster than SHA-256 on 64-bit hardware. It is used in some NIST-compliant security applications. This tool generates full SHA-512 (128 hex chars).
SHA-512 produces a 512-bit hash because the SHA-2 specification defines it that way. Each bit doubles the keyspace — going from 256 bits to 512 bits squares the number of possible hashes (from 2²⁵⁶ to 2⁵¹²). The 128 hexadecimal characters represent those 512 bits at 4 bits per character. For shorter output at similar security, consider SHA-256 or SHA-384.
No known algorithm can reverse a SHA-512 hash for a non-guessable input. The output space has 2⁵¹² possible values — astronomically larger than the number of atoms in the observable universe. Brute-forcing a SHA-512 hash is considered computationally infeasible with any conceivable technology, including quantum computers (Grover's algorithm halves effective bit security to 256 bits, still completely impractical).
SHA-2 (which includes SHA-256, SHA-384, and SHA-512) was designed by the NSA and published by NIST in 2001. SHA-3 was designed by a different team and selected by NIST in 2012 as a backup standard with a completely different internal structure (Keccak sponge construction). Both SHA-2 and SHA-3 are currently considered secure. SHA-2 is far more widely deployed in existing systems and protocols.
