Hash Generator

It's a function that takes an input of any length and produces a fixed-size string of characters. The same input always produces the same output, but there's no practical way to work backward from the output to figure out what the original input was.

No, not directly. Hashing is one-way by design, unlike encryption, which uses a key to lock and reopen data. Attackers instead try to guess the original input by hashing huge lists of common passwords or words and checking for a match, which is a different attack entirely from reversing the hash itself.

MD5 has well-documented collision vulnerabilities, meaning researchers have demonstrated two different inputs producing an identical hash. That breaks the core guarantee a hash is supposed to provide, so MD5 is fine for basic checksums but shouldn't be trusted for passwords, digital signatures, or anything where tampering matters.

Not on its own. SHA-256 is cryptographically strong but intentionally fast, which actually works against you for password storage, since a fast algorithm lets an attacker try billions of guesses per second on stolen hashes. Dedicated password hashing algorithms like bcrypt or Argon2 are deliberately slow for exactly this reason.

No, this is built for text input specifically. Verifying a downloaded file's integrity against a published checksum usually calls for a command-line tool or a dedicated file-hashing utility that reads the file's raw bytes.

Yes, hashing is deterministic, the same input always produces the exact same output every time. That's exactly how a login system checks your password without storing it in plain text: it hashes what you typed and compares that result against the hash stored in its database.