SHA-512 Hash Generator Online

SHA-512 produces a 512-bit (128 hex character) hash — double the output size of SHA-256. It's used when you need extra collision resistance, for example in high-security digital signatures, government systems, or when hashing large datasets where the extra margin is worth it.

How it works

The hash is computed client-side using the browser's built-in SubtleCrypto API. Your input text is processed entirely in your browser — nothing is sent to a server. The output is a 128-character hexadecimal string.

How to use it

1. Paste or type your input text
2. Click Generate Hash or type and watch it update in real time
3. Copy the 128-character hex output

A few things worth knowing

• Output size: SHA-512 produces 512 bits (128 hex characters). SHA-256 produces 256 bits (64 hex characters). Both are considered cryptographically secure
• Performance: SHA-512 is actually faster than SHA-256 on 64-bit processors because it operates on 64-bit word sizes, making it efficient despite the larger output
• Same properties as SHA-256: Deterministic, one-way, fixed output length regardless of input size
• When to use SHA-512 over SHA-256: In most web applications, SHA-256 is sufficient. SHA-512 is preferred in higher-security contexts or when the output feeds into a system that benefits from the larger digest size

FAQ

Is SHA-512 more secure than SHA-256? It has a larger output so more theoretical collision resistance, but both are considered equally secure for current practical purposes. Neither has known exploitable weaknesses.

Can I reverse a SHA-512 hash? No — SHA-512 is a one-way function. The only attack is brute force or rainbow tables, which are computationally infeasible for SHA-512.

Is this safe for hashing passwords? Don't use raw SHA-512 for passwords — it's too fast, making brute-force attacks cheap. Use bcrypt, scrypt, or Argon2 instead, which are specifically designed to be slow.

Related Tools

• SHA-256 Hash Generator
• SHA-1 Hash Generator