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Generate MD5, SHA-1, SHA-256, and SHA-512 hashes for text and verification.
A cryptographic hash function converts any input into a fixed-length string of characters. The same input always produces the same hash, but even a tiny change creates a completely different output.
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| Algorithm | Bits | Security |
|---|---|---|
| MD5 | 128 | Broken |
| SHA-1 | 160 | Weak |
| SHA-256 | 256 | Secure |
| SHA-512 | 512 | Secure |
For passwords: Never use plain hashes. Use dedicated password hashing functions like bcrypt, scrypt, or Argon2 that include salting and key stretching.
100% Client-Side: All hashing happens in your browser. Your data never leaves your device.
Formula
hash = H(message) → fixed-length digestH = Hash function (MD5, SHA-1, SHA-256, SHA-512)
message = Input data of arbitrary length
digest = Fixed-size output: 128 / 160 / 256 / 512 bits respectively
Worked Example
SHA-256 of "Hello, World!"
Did you know? SHA-256 powers Bitcoin mining — every block header must hash below a target value. The Bitcoin network computes trillions of SHA-256 hashes per second to secure the blockchain.
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