Free Hash Generator – Generate MD5, SHA-1, SHA-256, SHA-512 Hashes Online
Cryptographic hash functions are fundamental building blocks of modern computer security. A hash function takes an input of any size and produces a fixed-size output (the hash or digest) that uniquely represents the input data. Even a tiny change to the input produces a completely different hash, making these functions essential for data integrity verification, password storage, and digital signatures.
Our hash generator supports four of the most widely used algorithms. MD5 (Message Digest 5) produces a 128-bit (32-character hex) hash. While fast and widely supported, MD5 is considered cryptographically broken and should not be used for security purposes. It remains useful for non-security checksums and file verification. SHA-1 (Secure Hash Algorithm 1) produces a 160-bit (40-character) hash and was the standard for many years, but collision attacks have been demonstrated, so it is being phased out.
SHA-256 and SHA-512 are part of the SHA-2 family and are currently the recommended algorithms for security applications. SHA-256 produces a 256-bit (64-character) hash and is used in Bitcoin mining, SSL certificates, and many authentication systems. SHA-512 produces a 512-bit (128-character) hash and provides even greater security at the cost of slightly longer computation time.
All hashing in this tool is performed entirely in your browser using the Web Crypto API (SubtleCrypto) for SHA algorithms and a JavaScript implementation for MD5. No data is ever sent to any server, ensuring complete privacy. Simply type or paste your text and all four hashes are generated simultaneously in real-time.