Hash Generator — Frequently Asked Questions
Everything you need to know about using Hash Generator.
What is a hash function?
A function that takes any input and produces a fixed-length output (the digest). Same input always gives the same output, but you cannot reverse the digest back to the input.
Which SHA algorithm should I use?
SHA-256 for almost everything in 2025+. SHA-384 and SHA-512 only when explicitly required by a spec or for extra-paranoid systems. SHA-1 only for compatibility with legacy non-security uses.
Why is MD5 not included?
MD5 has known collisions and is unsuitable for any security purpose. Including it would encourage misuse. If you need MD5 for legacy compatibility, openssl or md5 from the command line will do.
Is hashing the same as encryption?
No. Encryption is reversible with a key. Hashing is one-way — designed so you cannot recover the input from the output.
Where does the hashing happen?
Entirely in your browser using the Web Crypto API (crypto.subtle.digest). Your input text never leaves your device.
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