Hash Generator
Generate cryptographic hashes (SHA-256, SHA-384, SHA-512, MD5) from any text, instantly in your browser. All computation is strictly client-side.
SHA-1
SHA-256
SHA-384
SHA-512
What is a Cryptographic Hash?
A hash function takes an input (or 'message') and returns a fixed-size string of bytes. It is a one-way mathematical algorithm — it is impossible to reverse the hash back into the original text. Hashes are used for verifying file integrity, storing passwords securely, and in blockchain technology.
SHA-256 vs SHA-1 vs MD5
- SHA-256: Part of the SHA-2 family. Extremely secure and currently the industry standard.
- SHA-1 & MD5: Older hashing algorithms that are now considered cryptographically broken. They should only be used for legacy systems or non-security checksums.
What is a Cryptographic Hash?
A cryptographic hash function is a mathematical algorithm that maps data of arbitrary size to a fixed-size bit array (the “hash value” or “digest”). It is a one-way function, meaning it is computationally infeasible to reverse the computation and discover the original input from its hash.
Hashes are heavily used in modern computing for data integrity checks, digital signatures, and password verification. When you create an account on a secure website, the site does not store your actual password — it stores the hash of your password. When you log in, the site hashes the entered password and compares it against the stored hash.
SHA-256 vs. MD5
SHA-256: Part of the SHA-2 family designed by the NSA. It generates a 256-bit (32-byte) hash. It is currently the industry standard for cryptographic security and is used in SSL/TLS certificates and Bitcoin mining.
MD5: An older algorithm that produces a 128-bit hash. It is mathematically broken and vulnerable to collision attacks. It should never be used for security purposes, but is still occasionally used for non-cryptographic checksums to verify file integrity against accidental corruption.
Privacy and Security Guarantee
Many online hash generators send the text you type to a remote server. If you are hashing sensitive information such as an API secret, a password, or a personally identifiable string, you are inadvertently leaking that data to the site owner.
This tool uses the window.crypto.subtle.digest() Web API to compute the hash entirely within your browser's memory. Your input string never traverses a network and is never logged by our servers.