SHA-512 Hash Generator
Generate a 512-bit SHA-512 hash from any text, instantly, in your browser.
Your data is processed entirely in your browser and is never uploaded.
Tool workspace
Options
Generate a SHA-512 hash in three steps
Paste your text
Type or paste the message you want to hash: a password, a payload, a file checksum, anything.
Pick an encoding
Hex is the standard for checksums and APIs; Base64 is more compact for tokens and URLs.
Hash & export
Click Hash, then copy the digest or download it. The hashing never leaves your browser.
A 512-bit cryptographic fingerprint
SHA-512 processes input in 1024-bit blocks through 80 rounds and produces a fixed 512-bit digest. It is a one-way function: the same input always gives the same hash, but the original input cannot be recovered from the hash. A single changed character produces a completely different digest, which makes SHA-512 useful for integrity checks, digital signatures, and high-security identifiers. SHA-512 is not encryption, and it is not the right choice for passwords because it is intentionally fast; use bcrypt for password storage.
Things to know
Output length
SHA-512 outputs 512 bits: 64 raw bytes, 128 hex characters, or about 88 Base64 characters. Load the example and switch between Hex and Base64 to see both forms.
hello
One-way, not encryption
You cannot decrypt a SHA-512 hash. Attackers can only try guesses and compare hashes, so weak inputs such as short passwords are still vulnerable even though the algorithm itself is one-way.
SHA-512 vs SHA-256
Both are secure. SHA-512 has a longer digest and can be faster on 64-bit systems. SHA-256 is shorter, more widely adopted, and often the safer default for interoperability.
Not for passwords
SHA-512 is too fast for password storage. Use a slow password hash such as bcrypt with a unique salt and an appropriate cost factor.
Avalanche effect
Changing one character completely changes the output. Load both examples below and compare the digests. One capital letter is enough to change the entire hash.
Try these
hello
The SHA-512 hash of 'hello'.
Hello
Capital H changes the entire digest.
pair this withFaster 256-bit hash → SHA-256 Hash Generator·Legacy checksum → MD5 Hash Generator·Hash passwords instead → bcrypt Password Hasher
Go deeper
Quick answers
Is my text uploaded?
No. The hashing happens entirely in your browser using the native Web Crypto API.
What is SHA-512?
SHA-512 is a one-way cryptographic hash function that produces a 512-bit digest, usually shown as 128 hexadecimal characters. It is used for integrity checks, digital signatures, and high-security hashing.
Can SHA-512 be decrypted?
No. SHA-512 is one-way by design. The hash cannot be decrypted back to the original input. Weak inputs can still be discovered by guessing and hashing many candidates.
Is SHA-512 secure?
Yes, for hashing and integrity use. SHA-512 has no practical collision attack known. It is not fully quantum-proof, but it provides a large security margin. For passwords, use bcrypt instead.
SHA-256 vs SHA-512: which should I use?
Both are secure. SHA-256 is shorter and widely adopted. SHA-512 gives a longer digest and can be faster on 64-bit systems. Use SHA-512 when you want extra margin; useSHA-256 for compatibility.
What is the output length of SHA-512?
SHA-512 outputs 512 bits: 64 raw bytes, 128 hex characters, or about 88 Base64 characters.
Can I use SHA-512 for passwords?
No. SHA-512 is too fast for password storage. Use a slow password hash such asbcrypt with a unique salt.
How is SHA-512 different from SHA-256?
Both belong to the SHA-2 family. SHA-512 produces a 512-bit digest (128 hex chars) vs SHA-256's 256 bits (64 hex chars), and uses 64-bit word operations. That is why it's the natural choice on 64-bit platforms. See the SHA-256 vs SHA-512 comparison.