Hash Generator (MD5/SHA1/SHA256/SHA512)

MD5 and SHA-1 are cryptographically broken for security purposes (it's feasible to engineer a second input with the same hash), but they're still everywhere for non-security uses: checking a downloaded file matches a publisher's checksum, detecting accidental corruption, or working with older systems and tools that only speak MD5 or SHA-1. This tool includes them for exactly those cases, not for hashing passwords.

No. Every algorithm here is a fast, general-purpose hash, the opposite of what password storage needs. Passwords should use a slow, salted algorithm built for that purpose, like Argon2 or bcrypt, both of which are separate tools on this site.

Paste a hash value you already have, for example the checksum a software publisher lists on their download page, and it's checked against every hash computed above. A match tells you the file or text you have is byte-for-byte identical to the original; the comparison works regardless of case.

The file is read and hashed using WebAssembly, which is substantially faster than pure JavaScript for this kind of work, so even large files are typically processed in well under a second without the tab feeling unresponsive.

It's rarely more expensive to compute all nine than to compute one, since the input only has to be read once, and having every value on screen at once means you can immediately compare against a checksum published in any of these formats without re-running anything.