Create SHA-512 Hashes Online Generate SHA-512 hash digests from text using the SubtleCrypto API.

The tool works by utilizing the Web Cryptography API's `window.crypto.subtle.digest` method to generate a SHA-512 hash from the input data. This method takes two parameters: the algorithm name, which in this case is 'SHA-512', and the data to be hashed, which is first encoded into bytes using the `TextEncoder` class. The resulting hash buffer is then converted into an array of integers, each representing a byte in hexadecimal format, padded with zeros if necessary. If the SubtleCrypto API is not supported by the browser, it falls back to using CryptoJS's SHA512 implementation.

The input data is processed as the user types, and the `generateHash` function is called whenever the text area contents change. The generated hash is then displayed in a read-only text area below the input field. When the copy button is clicked, the tool uses the `copyToClipboard` function to copy the generated hash into the system clipboard. This function returns a boolean value indicating whether the operation was successful or not.

Internally, SHA-512 operates on 1024-bit blocks of data, using eight 64-bit working variables that are initialized with values derived from the square roots of the first eight prime numbers. The algorithm consists of 80 rounds of processing, each round applying a set of bitwise operations including sigma, choice, and majority functions, along with constants generated from the cube roots of the first 80 prime numbers. This results in a secure hash value that is highly resistant to collisions.

The performance of SHA-512 can reach speeds of over 500 MB/s when using the SubtleCrypto API, making it suitable for large-scale data processing applications where high-speed hashing is required. The tool's implementation allows developers and system administrators to easily generate SHA-512 hashes online without needing to manually handle hash generation or use a separate utility program.