5 min read
Hash Generator Guide — MD5, SHA1, SHA256 Explained
Learn about hash functions and how to use our free online hash generator for MD5, SHA1, SHA256, and more.
What is a Hash Function?
A hash function converts input data into a fixed-size string of characters. It is a one-way function — you cannot reverse the hash back to the original input.
Common uses: password storage, file integrity verification, digital signatures, and data deduplication.
MD5 vs SHA1 vs SHA256
MD5 produces 128-bit hashes. Fast but not cryptographically secure — suitable only for checksums.
SHA1 produces 160-bit hashes. Deprecated for security use but still common in Git.
SHA256 produces 256-bit hashes. Recommended for security applications and password hashing.