Hash Generator

Generate cryptographic hashes from any text using SHA-1, SHA-256, and SHA-512 algorithms. Cryptographic hash functions take input data and produce a fixed-size string that acts as a unique digital fingerprint. This tool is useful for verifying file integrity, storing passwords securely with salt, creating digital signatures, and detecting data tampering. All hashing is performed locally using the Web Crypto API — nothing is transmitted over the internet.

Input Text

SHA-256

SHA-512

SHA-1

About Cryptographic Hashing

A cryptographic hash function converts any input into a fixed-length output that is practically impossible to reverse. Even a tiny change in the input produces a completely different hash. This property makes hashing essential for password storage, data integrity checks, and blockchain technology. Unlike encryption, hashing is a one-way process — you cannot recover the original data from a hash.

Frequently Asked Questions

Which hash algorithm should I use?SHA-256 is the most widely recommended for general use. SHA-512 offers a longer output for higher security needs. SHA-1 is legacy and should be avoided for new applications.

Can hashes be reversed?No. Cryptographic hash functions are one-way. However, weak passwords can be guessed using precomputed rainbow tables, which is why salting is recommended for password storage.

Is this tool safe for passwords?This tool generates unsalted hashes. For password storage in production, always use a dedicated library like bcrypt or Argon2 with proper salting.