Hash Generator
Generate SHA-256 or SHA-512 hashes from typed text.
Processed privately on your device
Hashes are one-way fingerprints; they are not encryption.
Helpful guidance
Enter text and select SHA-256 or SHA-512; the hexadecimal digest updates automatically.
WebCrypto hashes the UTF-8 bytes, so identical text always produces the same digest.
Cryptographic hashes are one-way fingerprints: they verify equality but cannot recover the original text.
Frequently asked questions
Can a hash be decoded?
No. Secure hash functions are intentionally one-way; checking requires hashing a candidate again.
Which algorithm should I choose?
SHA-256 is broadly sufficient; SHA-512 provides a longer digest when a system specifically requires it.
Why does one character change the whole result?
Cryptographic hashes are designed with an avalanche effect so small input changes alter many output bits.
Is the text sent anywhere?
No. The browser WebCrypto API computes the digest locally.