Free Online Hash Generator — MD5, SHA1, SHA256, SHA512
Generate cryptographic hashes from any text input. Supports MD5, SHA-1, SHA-256, and SHA-512 algorithms. All processing happens server-side using native Node.js crypto.
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Frequently Asked Questions
What is a cryptographic hash?
A hash function takes any input and produces a fixed-length output (digest). The same input always gives the same output, but even a tiny change in input produces a completely different hash. Hashes are one-way — you cannot reverse them to recover the original input.
Which hash algorithm should I use?
SHA-256 or SHA-512 for general security purposes. MD5 and SHA-1 are cryptographically broken and should only be used for checksums where collision resistance is not required. Never use MD5 or SHA-1 for passwords.
Can I use this to hash passwords?
No. Plain SHA hashes are too fast for password storage. Use a slow, purpose-built algorithm like bcrypt, Argon2, or scrypt, which are designed to resist brute-force attacks.