Type any text and get back its MD5, SHA-1, or SHA-256 hash instantly. Hashes are used to verify file integrity, store passwords securely (though not with MD5), and create unique fingerprints for data. All hashing runs in your browser. Nothing you type is ever sent to a server.
Frequently Asked Questions
An MD5 hash is a 32-character hexadecimal string produced by running data through the MD5 algorithm. The same input always produces the same output, but you cannot reverse the hash to get the original input. Even a tiny change to the input produces a completely different hash.
No. MD5 is fast, which is exactly the problem for passwords. Attackers can try billions of guesses per second against MD5 hashes. Use bcrypt, scrypt, or Argon2 for passwords. Those are specifically designed to be slow and resistant to brute-force attacks.
File integrity checks are the main use. Download a file, hash it, compare the hash against the one the website published. If they match, the file has not been tampered with. MD5 is also used as a quick checksum in non-security contexts like cache keys and deduplication.
They are all hashing algorithms but with different output lengths and security levels. MD5 produces 32 hex characters. SHA-1 produces 40. SHA-256 produces 64. SHA-256 is considered cryptographically secure for most purposes today. MD5 and SHA-1 have known vulnerabilities and should not be used for anything security-critical.
Yes. This is called a collision. MD5 is known to have practical collision vulnerabilities, meaning it is possible to engineer two different files that produce the same MD5 hash. This is why MD5 is no longer recommended for security. SHA-256 has no known practical collisions.
In the browser. Your input text never leaves your device. The JavaScript runs locally to compute the hash. This makes it safe to hash sensitive strings like API keys or internal identifiers you just want to verify quickly.