SHA-512 Generator – Generate a SHA-512 Hash from Text or Files

Create a 128-character SHA-512 hash from any text, emoji, or file instantly. Compare against an expected hash, switch between uppercase and lowercase hex, and copy with one click. Everything runs in your browser — nothing is uploaded.

Input

Text or file to hash
UTF-8 encoding: your text is converted to UTF-8 bytes before hashing, so emojis and non-English characters produce the same SHA-512 as they would in any other standard tool. Hashing is local in JavaScript, so very large pastes (over ~100 KB) may take a moment.
Uppercase hex
Show the hash in uppercase instead of lowercase

SHA-512 Hash

512-bit · 128 hex characters
SHA-512 is secure. No practical collision or preimage attacks exist against full SHA-512. Use it for TLS, digital signatures, file integrity, HMAC, and high-security applications. On 64-bit CPUs it is often faster than SHA-256. Don't use it directly for password storage — use Argon2id, bcrypt, or scrypt.
SHA-512
Your SHA-512 hash will appear here as you type.
Compare with expected SHA-512optional
Input chars
0
UTF-8 bytes
0
Hash length
0
Live hashing: the hash updates automatically as you type. The empty string hashes to cf83e1357eefb8bd…af927da3e.

What is a SHA-512 generator?

A SHA-512 generator takes any input — a word, a sentence, a password, an emoji, or an entire file — and runs the SHA-512 (Secure Hash Algorithm 512-bit) message-digest algorithm on it to produce a fixed 512-bit fingerprint. That fingerprint is almost always written as 128 hexadecimal characters. The same input always produces exactly the same SHA-512 hash, which is what makes it useful for checksums, signatures, integrity verification, and high-security applications where a longer digest is desirable.

SHA-512 was designed by the NSA and published by NIST in 2001 as part of the SHA-2 family, alongside SHA-224, SHA-256, and SHA-384. Unlike its predecessor SHA-1, which was broken by the 2017 SHAttered attack, SHA-512 has no practical collision, preimage, or second-preimage attacks as of 2025. It is as secure as SHA-256 for every practical purpose, with a larger internal state (512-bit output, 1024-bit block) and sometimes better performance on modern 64-bit hardware.

How SHA-512 hashing works

SHA-512 is a Merkle–Damgård construction. It processes the input in 1024-bit (128-byte) blocks through 80 rounds of bitwise operations and 64-bit modular addition, producing a 512-bit digest. Three properties matter in practice:

  • Deterministic: the same bytes always produce the same hash. Change one character and the hash changes completely (the avalanche effect).
  • Fixed length: whether the input is one character or a 50 MB file, the output is always 128 hex characters. That is 512 bits ÷ 4 bits per hex character.
  • One-way and collision-resistant: you cannot reverse a hash to recover the original input, and no practical way exists to find two inputs with the same SHA-512 hash.

Because SHA-512 operates on bytes, not characters, text encoding matters. This tool encodes your input as UTF-8 before hashing. If another tool hashes UTF-16 or Latin-1, or silently appends a newline, you will get a different hash for what looks like the same text. That is the single most common reason people see a "SHA-512 mismatch" — not a broken algorithm, but a different byte sequence.

When SHA-512 is the right tool

SHA-512 is one of the strongest general-purpose hashes available. For security-critical work, SHA-512 and SHA-256 are equally acceptable; the choice often comes down to digest length and CPU architecture. SHA-512 is the better pick when you control both ends and want maximum performance on 64-bit CPUs.

Use caseIs SHA-512 appropriate?Why
TLS 1.2 / 1.3 certificate signatures (high-security suites)✅ YesUsed for ECDSA P-521, RSA-8192, and other large-key signature algorithms.
Digital signatures (code signing, document signing)✅ YesNo practical collision attacks. Mandatory for the strongest signature schemes.
File integrity checks✅ YesDetects corruption and malicious substitution.
HMAC-SHA512 (authentication)✅ YesStandard for JWT HS512, API authentication, and message authentication codes.
PBKDF2-HMAC-SHA512 password hashing⚠️ Only if neededAcceptable when interoperating with an existing PBKDF2 system, but Argon2id is preferred for new password storage.
Content addressing and deduplication✅ YesLarger digest reduces accidental collisions further.
Password storage (direct hash)🛑 NoUse Argon2id, bcrypt, or scrypt with a per-user salt. SHA-512 is far too fast.
Embedded / 32-bit systems⚠️ Usually notSHA-256 is faster and better sized on 32-bit CPUs with limited memory.

SHA-512 vs SHA-256 vs SHA-384 vs SHA-1 vs MD5

The five hashes people confuse most. SHA-512 and SHA-256 are both secure — the choice comes down to digest length and CPU architecture. SHA-384 uses the same compression function as SHA-512 with different initial values. SHA-1 and MD5 are legacy.

PropertyMD5SHA-1SHA-256SHA-384SHA-512
Digest size128 bits (32 hex)160 bits (40 hex)256 bits (64 hex)384 bits (96 hex)512 bits (128 hex)
Block size512 bits512 bits512 bits1024 bits1024 bits
Internal word size32-bit32-bit32-bit64-bit64-bit
Published19911995200120012001
Collision status🛑 Broken🛑 Broken✅ Secure✅ Secure✅ Secure
Speed on 32-bit CPUsFastestFastFastSlowSlowest
Speed on 64-bit CPUsFastestFastFastFaster than SHA-256Faster than SHA-256
Recommended forLegacy checksums onlyLegacy compatibility onlyAll new security workTLS certificates, ECDSA P-384High-security applications, large-key signatures

One fact that surprises people: on 64-bit CPUs, SHA-512 is often 1.2× to 2× faster than SHA-256. SHA-512's internal 64-bit word size matches the CPU register width, so the algorithm executes fewer, wider operations. SHA-256 does more rounds with smaller 32-bit words and requires more instructions per byte. On modern desktop and server hardware, if you control both ends and want the fastest secure hash, SHA-512 wins. On 32-bit hardware, or where every byte of digest matters (TLS records, Bitcoin, etc.), SHA-256 remains the practical default.

If you need SHA-256, use the SHA-256 Generator. If you need SHA-1 or MD5 for legacy reasons, use the SHA-1 Generator or MD5 Generator — but only for non-adversarial checksums, never for security.

How to generate a SHA-512 hash

  1. Choose Text or File. Text mode hashes what you type. File mode hashes the exact bytes of the file, which is what you want for checksums.
  2. Enter the input. Text hashes live as you type. For files, drag and drop or click to browse. Files up to 50 MB are supported on secure contexts.
  3. Pick the hex case. Lowercase is the default and matches sha512sum output. Uppercase is useful when a target system expects it.
  4. Copy the hash. Use the copy button next to the hash field.
  5. Verify if needed. Paste the expected hash into the Compare field. The tool strips surrounding whitespace and compares case-insensitively, showing a clear match or no-match badge.

Frequently asked questions

A SHA-512 generator takes any input — text, a password, or a file — and runs the SHA-512 message-digest algorithm to produce a fixed 512-bit fingerprint, shown as 128 hexadecimal characters. The same input always produces the same SHA-512 hash, which is why it is used for TLS, digital signatures, file integrity checks, HMAC, and high-security applications where a longer digest is desirable.
Yes. SHA-512 is part of the SHA-2 family, published by NIST in 2001. No practical collision, preimage, or second-preimage attacks exist against full SHA-512. It is as secure as SHA-256 for every practical purpose, and sometimes considered slightly more conservative because of its larger internal state (512-bit digest, 1024-bit block). Do not use SHA-512 directly for password storage — use a dedicated password KDF such as Argon2id, bcrypt, or scrypt instead.
No. SHA-512 is a one-way hash, not encryption, so there is no decryption key. You cannot reverse a hash to recover the original input. What people call SHA-512 decryption is usually a lookup against precomputed hashes or a brute-force dictionary attack, which only works for weak or common inputs.
Yes. Input is encoded as UTF-8 before hashing, so emojis, accented characters, Arabic, Hindi, Chinese, and any other Unicode text produce the standard SHA-512 hash that other tools and languages produce for the same UTF-8 bytes.
SHA-512 produces a 512-bit digest. Each hexadecimal character represents 4 bits, so 512 ÷ 4 = 128 characters. The hash is always exactly 128 hex characters, whether the input is one character or a multi-gigabyte file.
The SHA-512 hash of the empty string is cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e. It is a useful known-answer test when verifying a SHA-512 implementation.
Both are secure. SHA-256 produces a 256-bit digest (64 hex characters) and is widely supported. SHA-512 produces a 512-bit digest (128 hex characters) and, on 64-bit CPUs, is often actually faster than SHA-256 because its internal 64-bit word size matches the CPU register width. On 32-bit CPUs or constrained devices, SHA-256 is faster. For most applications, SHA-256 is the safer default for compatibility; SHA-512 is a good choice when you control both ends and want a larger digest or maximum speed on modern 64-bit hardware.
It depends on the CPU. On 64-bit processors with 64-bit registers and 64-bit arithmetic (desktop, server, modern mobile), SHA-512 is typically 1.2× to 2× faster than SHA-256 because its internal operations map cleanly to native 64-bit words. On 32-bit processors, SHA-512 is significantly slower because it has to emulate 64-bit arithmetic with pairs of 32-bit words.
Yes. The tool is free, requires no signup, and runs entirely in your browser. The text you type and the files you select are never uploaded to a server. File hashing uses the Web Crypto API which runs locally and may be hardware-accelerated. Close the tab and the data is gone.
The most common cause is text encoding. This tool hashes the UTF-8 bytes of your text. If another tool hashes UTF-16, Latin-1, or adds a newline to your input, the hash will differ. Check that both tools use UTF-8 and that no extra whitespace or line break is included.
SHA-512 is used in TLS 1.2 and 1.3 for higher-security certificate signatures, in code signing, in HMAC-SHA512 for authentication, in SHA-512/256 and SHA-512/224 variants used by newer blockchain and cryptocurrency systems, in password hashing via HKDF and PBKDF2, and in countless file-integrity and verification systems where a longer digest is desirable. SHA-512 is also the internal engine of SHA-384.
SHA-384 uses the exact same compression function as SHA-512 but with different initial values and truncates the output to 384 bits (96 hex characters). SHA-384 is slightly faster than SHA-512 (fewer output words to serialize) and is often preferred for TLS and certificate signatures, where 384 bits of security is more than enough.