SHA-512 Hash Generator
Generate the SHA-512 hash of any text instantly in your browser. UTF-8, hex or Base64 input; hex or Base64 output. Free, private, no upload.
Runs entirely in your browser. Your data is never uploaded.
What is SHA-512 Hash Generator?
SHA-512 is the 512-bit (128 hex character) member of the SHA-2 family, designed around 64-bit arithmetic. This tool computes the 512-bit SHA-512 digest of text or raw bytes (hex or Base64) as you type and shows it as 128 hex characters or Base64.
How to use SHA-512 Hash Generator
- Type or paste your input into Text to hash — the digest updates as you type (an empty box shows the hash of empty input).
- Choose the Input encoding: Text (UTF-8) hashes the characters as UTF-8, Hex bytes or Base64 hash the decoded raw bytes.
- Pick the Output format (hex lowercase, hex uppercase or Base64) and click Copy.
Example
abc
ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f
SHA-512 of the 3 ASCII bytes "abc" (UTF-8, hex lowercase output), the standard test vector.
When to use SHA-512 Hash Generator
Use the SHA-512 text tool to hash strings: reproduce a value from documentation or code, build test vectors, compare an API signature input, or check what a program should output. Do not use it to check a downloaded file: copying file contents into a text box changes line endings and encoding, so use the SHA-512 file checksum tool. If you need a shorter value with the same engine, use SHA-512/256 rather than cutting SHA-512 yourself.
How SHA-512 Hash Generator works
SHA-512 pads the message to a multiple of 1024 bits (1 bit, zeros, 128-bit big-endian length), expands each block into 80 64-bit words and runs 80 rounds over eight 64-bit state words with the Σ, σ, Ch and Maj functions and 80 constants from the cube roots of the first 80 primes. The eight final words form the digest. The text is first converted to bytes (UTF-8 by default), so the same characters always give the same hash.
Common Use Cases
- Check the expected SHA-512 of a string in a unit test or fixture
- Hash hex bytes copied from a debugger, packet capture or protocol spec
- Compare SHA-512 output between two programming languages that disagree
- Generate deterministic identifiers or cache keys from text
- Get the Base64 form of a SHA-512 digest for headers or configuration files
Security Note
SHA-512 has no known practical attacks. Plain hashes are also not suitable for storing passwords: use a slow, salted password hash such as Argon2, scrypt or bcrypt. Everything is computed locally in your browser; nothing you type is sent anywhere.
FAQs
Is SHA-512 more secure than SHA-256?
It has a larger security margin (256-bit collision resistance) but SHA-256 is already far beyond brute force. The practical differences are output size and speed: SHA-512 is usually faster on 64-bit CPUs.
Can I shorten a SHA-512 hash?
You can truncate it, but the standardized short variants SHA-512/224 and SHA-512/256 use different initial values, so a truncated SHA-512 will not match them. Use those tools if a protocol asks for SHA-512/256.
Why does the hash change completely when I change one character?
That is the avalanche effect every cryptographic hash is designed for: flipping one input bit changes about half of the 512 output bits, so similar inputs give unrelated digests.
Does a trailing space or newline matter?
Yes. The hash covers every byte, so abc and abc followed by a newline give different SHA-512 values. Make sure the input contains exactly the bytes you intend to hash.