Hash Generator

Generate SHA-256 and SHA-1 hashes of any text. Runs entirely in your browser using the Web Crypto API.

Enter text to hash

SHA-256 produces a 256-bit (64 character hex) hash. It is the current industry standard, used in Bitcoin, TLS, and file integrity checks.
SHA-1 produces a 160-bit (40 character hex) hash. It is considered weak against collision attacks and should not be used for security-critical applications.
Hashes are one-way: you cannot reverse a hash back to the original text.
Even a tiny change in the input produces a completely different hash (avalanche effect).
Common uses: verifying file downloads, storing passwords (with salt), digital signatures.