Get the MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes of any text or file at once, and check a download against the hash its publisher lists. Files are hashed on your device and never uploaded.
Use SHA-256 for most purposes, including checking downloads. MD5 and SHA-1 are fine for spotting accidental changes, but are no longer safe against deliberate tampering. Use SHA-512 when a system asks for it.
No. These hashes are designed to be fast, which makes guessing passwords fast too. Passwords should be stored with a slow algorithm made for the purpose, such as Argon2, bcrypt, or scrypt.
Usually the input is not exactly the same. A trailing line break, a different line ending (Windows uses \r\n), or a different text encoding all change the hash. For example, the echo command adds a line break unless you use echo -n.
No. A hash is a one-way fingerprint. Short or common text can sometimes be found by guessing, which is another reason not to rely on fast hashes for secrets.
You can also come chat with us on the Stoic Dreams discord server.