🔐 Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text input. Uses the Web Crypto API for accurate results.
📖 What are Hash Functions?
A cryptographic hash function takes an input (text, file, etc.) and produces a fixed-length string of characters called a hash or digest. Hash functions are one-way — you cannot reverse a hash back to its original input. Even a single character change produces a completely different hash.
MD5 produces a 128-bit (32 hex character) hash. It's fast but no longer considered cryptographically secure. Still widely used for file checksums. SHA-1 produces a 160-bit hash and is deprecated for security. SHA-256 (part of SHA-2 family) produces a 256-bit hash and is the current standard used in SSL/TLS, blockchain, and digital signatures. SHA-512 produces a 512-bit hash for maximum security.
❓ Frequently Asked Questions
Hashing is used for password storage (websites store hashes, not plain passwords), file integrity verification (comparing checksums), digital signatures, blockchain, data deduplication, and caching.
No. Hash functions are designed to be one-way. However, common short inputs can be found using rainbow tables or brute force. This is why passwords should be long and salted before hashing.