JavaScript

SHA512 Hash Generator - Encrypt Text Online

Generate SHA-512 hashes from any text string. Learn how SHA-512 hashing works and how to implement it in JavaScript and PHP.

SHA-512 Hash Generator

SHA-512 (Secure Hash Algorithm 512-bit) produces a 128-character hexadecimal hash from any input. It's part of the SHA-2 family and is widely used for data integrity verification, digital signatures, and content authentication.

Generate SHA-512 Hash

Input Text

SHA-512 Output

JavaScript Implementation (Web Crypto API)

Modern browsers provide the Web Crypto API for cryptographic operations. Here's how to generate SHA-512 hashes:

async function sha512(message) {
  const encoder = new TextEncoder();
  const data = encoder.encode(message);
  const hashBuffer = await crypto.subtle.digest('SHA-512', data);
  const hashArray = Array.from(new Uint8Array(hashBuffer));
  return hashArray
    .map(b => b.toString(16).padStart(2, '0'))
    .join('');
}

// Usage
sha512('Hello World').then(hash => console.log(hash));

PHP Implementation

<?php
$hash = hash('sha512', 'Hello World');
echo $hash;
// 2c74fd17edafd80e8447b0d46741ee243b7eb74dd2149a0ab1b9246fb30382f27e853d8585719e0e67cbda0daa8f51671064615d645ae27acb15bfb1447f459b

SHA-512 in Content Authentication

SHA-512 hashing is fundamental to content authentication and AI detection. When verifying whether digital content has been tampered with, cryptographic hashes create a unique fingerprint of the original file. Any modification - even a single bit change - produces an entirely different hash, making tampering immediately detectable.

This principle is used in C2PA (Coalition for Content Provenance and Authenticity) standards, digital forensics, and blockchain-based content verification systems.

Hash Properties

Deterministic

Same input always produces the same hash output.

One-Way

Cannot reverse-engineer the original input from the hash.

Collision-Resistant

Extremely unlikely for two different inputs to produce the same hash.

Fixed Length

Always produces a 512-bit (128 hex characters) output regardless of input size.

SHA-512 vs Other Hash Algorithms

Algorithm	Output	Security	Speed
MD5	128-bit	Broken	Fastest
SHA-1	160-bit	Broken	Fast
SHA-256	256-bit	Secure	Medium
SHA-512	512-bit	Secure	Faster on 64-bit

Last updated: 2026 • Browse all courses