How to Generate Hashes Online — MD5, SHA-1, SHA-256 and SHA-512

A hash function turns input data into a fixed-length output. Developers use hashes for checksums, integrity checks, caching, deduplication, signatures and security workflows. A small change in the input creates a very different hash.

Utilao's Hash Generator creates MD5, SHA-1, SHA-256 and SHA-512 hashes from text.

Hashing vs encryption

Hashing is one-way. You should not be able to recover the original input from a good cryptographic hash. Encryption is reversible with the correct key.

This means hashes are useful for verifying data, but they are not a way to hide data that needs to be recovered later.

MD5, SHA-1, SHA-256 and SHA-512

MD5 and SHA-1 are older algorithms and should not be used for security-sensitive purposes. They are still useful for simple checksums or legacy compatibility.

SHA-256 and SHA-512 are stronger choices for modern integrity checks and many security-related workflows. For password storage, use dedicated password hashing algorithms with salt, not plain SHA hashes.

How to generate a hash online

1. Open the Hash Generator.
2. Paste the text you want to hash.
3. Choose the algorithm.
4. Copy the generated hash.
5. Compare it with an expected hash if you are checking integrity.

FAQ

Can a hash be reversed?

Cryptographic hashes are designed to be one-way. You generally cannot reverse a hash to recover the original input.

Is MD5 secure?

No. MD5 is not recommended for security-sensitive use.

Should I hash passwords with SHA-256?

For real password storage, use dedicated password hashing algorithms with salt and work factors, not plain SHA-256.