SHA-512 Hash Generator
Calculate the SHA-512 hash of any string instantly in your browser. SHA-512 produces a 512-bit hash, is optimized for 64-bit CPUs, and provides the highest collision resistance in the SHA-2 family.
What Is a SHA-512 Hash?
SHA-512 belongs to the same SHA-2 family as SHA-256. Whatever the length of the string you feed it, it produces a fixed 512-bit value — 128 hexadecimal characters. Type into the input box and this tool computes the SHA-512 hash in your browser in real time, showing the result on the spot without sending anything to an external server.
As of 2026 no practical attack has been found against the SHA-2 family, and it is treated as a cryptographically secure hash function. That stands in contrast to MD5 and SHA-1, for which collisions — two different inputs yielding the same hash — have effectively been found. SHA-512 is widely adopted wherever trust matters: digital certificates, blockchains and detecting tampering with software.
How to Compute a SHA-512 Hash
- Type a string into the input box Paste or type the text you want hashed into the input box. The result updates automatically as you type.
- Read the SHA-512 hash It appears below the input as 128 hexadecimal characters. When the input is empty, the result field stays empty too.
- Grab the hash with the copy button Press «Copy» and the hash goes to your clipboard, ready to paste straight into another tool or into code.
Tips for getting more out of it
- SHA-512 belongs to the SHA-2 family and produces a 512-bit hash represented as 128 hexadecimal characters — twice the output length of SHA-256.
- SHA-512 is optimized for 64-bit CPUs and can be faster than SHA-256 on 64-bit hardware. For server-side processing, SHA-512 is often more efficient.
- Both SHA-256 and SHA-512 are equally secure today, but SHA-512's longer output provides a higher security margin for applications requiring extra headroom.
- Linux systems use
sha512crypt— a SHA-512-based scheme — as the default for password hashes in/etc/shadow(though dedicated algorithms like bcrypt are still preferred for passwords). - SHA-512/256 is a truncated variant that uses SHA-512's internal computation but outputs only 256 bits. Note that it runs slower than SHA-256 on 32-bit hardware.
When a SHA-512 Hash Comes in Handy
Verifying the integrity of a download
Compare the SHA-512 value published by the distributor with the value computed from the file you downloaded, and you can confirm there was no corruption or tampering in transit. (This tool takes text input only, so obtain a file's own hash with a separate file-hashing tool.)
Studying digital certificates and signatures
Parts of TLS certificates and code signing use SHA-2 family hash functions. When learning how certificates work, it helps to see for yourself what hash a given string produces.
Verification work around blockchains
Some blockchain implementations use SHA-2 family functions to verify block integrity. Useful for trying out hashes of arbitrary strings while you work out how it fits together.
Learning how password hashing works (not for production)
Real password storage uses bcrypt or Argon2, which provide salting and a tunable computational cost. SHA-512 on its own was not designed for that purpose, so keep this to learning and verification.
Glossary
- SHA-2
- The family name for hash functions including SHA-256 and SHA-512. Standardised by NIST, this group of algorithms is still regarded as cryptographically secure.
- Hash Function
- A function that converts data of any length into a fixed-length value. The same input always gives the same output, but the input cannot be worked back from the output.
- Output Length (512 bits)
- The length of the hash SHA-512 produces. Written in hexadecimal it comes to 128 characters — twice the length of SHA-256 (256 bits, 64 characters).
- One-Way Property
- The property that the original input data cannot be recovered from the hash by computation. It matters wherever you want to verify something while keeping the original hidden, such as password storage or tamper detection.
- Collision Resistance
- The property that makes it hard for two different inputs to produce the same hash. No practical collision has been found for SHA-512 to date, so it is considered to have high collision resistance.
- How It Differs from SHA-1
- SHA-1 has a 160-bit output, but a practical collision attack was published in 2017 and it is no longer regarded as secure. SHA-512 belongs to the SHA-2 family, the generation that succeeded SHA-1.
- Salt
- A random string added when hashing something like a password. It makes the same password produce different hashes and blocks precomputation attacks. SHA-512 on its own has no salting mechanism built in.
FAQ
Side Note — Why "512 Bits"? Bit Length and the Meaning of Security
When discussing hash function security, a key concept is the birthday problem. Due to the birthday paradox, finding a collision in an n-bit hash requires only 2^(n/2) attempts in theory. That means SHA-256 requires 2^128 attempts; SHA-512 requires 2^256.
How large is 2^128? Even combining all the computers on Earth, the time required would far exceed the age of the universe (~13.8 billion years). SHA-256 is already unbreakable in practice. SHA-512 pushes the bar to 2^256 — its square — a figure that is literally incomputable.
When quantum computers become practical, Grover's algorithm will effectively halve the security of hash functions (n bits becomes n/2 bits equivalent). SHA-256 would drop to 128-bit equivalent security; SHA-512 would retain 256-bit equivalent security. For systems designed to survive the quantum era, SHA-512 has a clear advantage.