Compute MD5, SHA-256 & SHA-512 File Hashes in Browser Calculate MD5, SHA-256, and SHA-512 hashes of any file in your browser.

The tool reads files as an ArrayBuffer, which is then converted into a format suitable for cryptographic computations. For SHA-256 and SHA-512 calculations, it utilizes the SubtleCrypto API, a browser-based cryptography interface that provides access to hardware-accelerated encryption algorithms. In contrast, MD5 computations rely on CryptoJS, a JavaScript library that implements various cryptographic functions, including hash generation. To convert the ArrayBuffer into a WordArray, a data structure used by CryptoJS, it employs a custom conversion function that rearranges the byte order of the input array.

When computing hashes, it uses Promise.all to concurrently calculate MD5, SHA-256, and SHA-512 values, ensuring efficient processing of large files. The calculated hash values are then stored in an object with properties corresponding to each algorithm. For verification purposes, it performs a case-insensitive comparison between the generated hash and a user-provided expected value, allowing for flexible matching of hashes regardless of their original casing. This approach enables accurate detection of hash mismatches or matches, providing users with confidence in the integrity of their files.

The tool's implementation also involves converting the resulting hash values into human-readable formats, such as hexadecimal strings, to facilitate easy comparison and validation. For instance, MD5 hashes are typically represented as 32-character hex strings, while SHA-256 and SHA-512 hashes are displayed as 64-character and 128-character hex strings, respectively. By using established libraries like CryptoJS and SubtleCrypto, it ensures compliance with widely accepted cryptographic standards and provides reliable hash generation capabilities within the browser environment.