Hash Generator (SHA-256, SHA-512, SHA-1)
Generate SHA-256, SHA-512, and SHA-1 hashes from text instantly. Compare hashes, verify file integrity, and check hash matches. Free tool.
Compare Hashes
What Is a Hash?
A hash is a fixed-size string of characters generated from input data using a mathematical algorithm. The same input always produces the same hash, but even a tiny change in the input produces a completely different hash. Hashes are one-way — you cannot reverse a hash back to the original text.
SHA-256 vs SHA-512 vs SHA-1
SHA-256 produces a 256-bit (64 character) hash and is the most widely used — it's the backbone of Bitcoin and SSL certificates. SHA-512 produces a 512-bit (128 character) hash and is more secure but longer. SHA-1 produces a 160-bit (40 character) hash and is considered deprecated for security purposes but still used for checksums and non-security applications.
Common Uses for Hashes
Hashes are used for password storage (websites store hashed passwords, not plaintext), file integrity verification (comparing checksums after download), digital signatures, blockchain technology, data deduplication, and caching. Never store passwords as plain text — always hash them.