Hash functions convert any input — text, a file, a password — into a fixed-length string of characters. They're used everywhere from password storage to file integrity checks. But not all hash algorithms are equal, and picking the right one matters.
MD5
MD5 produces a 128-bit hash and was widely used in the past for checksums and password storage. It's fast, but it's no longer considered secure — researchers have found ways to create "collisions" (two different inputs producing the same hash), which makes it unsuitable for security-sensitive uses like passwords. It's still fine for basic file integrity checks where security isn't critical.
SHA-1
SHA-1 produces a 160-bit hash and was designed as a more secure successor to MD5. However, it too has been shown to be vulnerable to collision attacks, and major tech companies have deprecated it for security purposes. It's still found in some legacy systems but is being phased out.
SHA-256
SHA-256 produces a 256-bit hash and is part of the SHA-2 family. It's currently considered secure and is the standard choice for password hashing (usually combined with salting), digital signatures, blockchain applications, and SSL certificates. Unless you have a specific reason to use something else, SHA-256 is generally the safest default choice today.
Generate MD5, SHA-1, and SHA-256 hashes instantly from any text.
#️⃣ Try the Free Hash GeneratorCommon Uses for Hash Generators
- File integrity verification: Confirming a downloaded file wasn't corrupted or tampered with
- Password storage: Storing a hash of a password instead of the password itself
- Data deduplication: Quickly checking if two files are identical without comparing every byte
- Digital signatures and checksums: Verifying data hasn't changed during transfer
Our free Hash Generator lets you instantly create MD5, SHA-1, and SHA-256 hashes from any text — right in your browser.