MD5 / SHA Hash Generator
Generate MD5, SHA-1, and SHA-256 hashes from any text instantly. All computation happens in your browser for maximum privacy.
About MD5 / SHA Hash Generator
Our Hash Generator computes three of the most commonly used cryptographic hash functions — MD5, SHA-1, and SHA-256 — from any text you enter. A hash function converts input data into a fixed-length string of characters, creating a unique "fingerprint" of the original data. Even a tiny change in the input produces a completely different hash.
MD5 produces a 128-bit (32-character) hash, SHA-1 produces a 160-bit (40-character) hash, and SHA-256 produces a 256-bit (64-character) hash. While MD5 and SHA-1 are no longer recommended for security purposes due to known vulnerabilities, they remain widely used for checksums, data integrity verification, and non-security applications. SHA-256 is part of the SHA-2 family and is currently considered secure for cryptographic use.
All hashing is performed locally in your browser using the Web Crypto API for SHA-1 and SHA-256, and a JavaScript implementation for MD5. Your input text never leaves your device, ensuring complete privacy.
Frequently Asked Questions
Q What is a hash function?
A hash function is a one-way mathematical algorithm that converts input data of any size into a fixed-length output string called a hash or digest. It's called "one-way" because you cannot reverse the process to recover the original input from the hash. Hash functions are deterministic — the same input always produces the same output — making them ideal for verifying data integrity.
Q Is MD5 still secure?
No, MD5 is considered cryptographically broken and should not be used for security purposes like password storage or digital signatures. Collision attacks (finding two different inputs that produce the same hash) are practical against MD5. However, MD5 is still useful for non-security purposes like file checksums, cache keys, and data deduplication where collision resistance isn't critical.
Q Which hash algorithm should I use?
For security-sensitive applications like password hashing or digital signatures, use SHA-256 or stronger (SHA-384, SHA-512, or bcrypt/Argon2 for passwords). For file integrity checks and non-security purposes, MD5 or SHA-1 are often sufficient and faster. SHA-256 is the recommended default for most modern applications that need a reliable, secure hash function.