Which hashes does it create?

MD5, SHA-1, SHA-256 and SHA-512, shown together for the same input.

Can a hash be reversed?

Not by calculation. Short or common inputs can still be found by trying guesses against known hashes, which is why passwords need a slow, salted hash such as bcrypt.

Is MD5 or SHA-1 still safe?

Not for security. Collisions can be made for both. They are fine as checksums, but use SHA-256 or better for anything an attacker might target.

Why does a tiny change give a completely different hash?

Hash functions are built so that any change to the input changes about half the bits of the output. This is called the avalanche effect.

Online Hash Generator MD5/SHA1/SHA256/SHA512

This free online tool lets you compute a hash using your desired algorithm, for example MD5 or SHA-256 and many others.

How to use it

Enter text and press Hash (or Enter) to get MD5, SHA1, SHA256 and SHA512 digests. Click Copy next to any hash.

About this tool

Enter text to get its MD5, SHA1, SHA256 and SHA512 digests together. The hashing is done on the server, so do not paste secrets you would not send over HTTPS.

Frequently asked questions

Which hashes does it create?: MD5, SHA-1, SHA-256 and SHA-512, shown together for the same input.
Can a hash be reversed?: Not by calculation. Short or common inputs can still be found by trying guesses against known hashes, which is why passwords need a slow, salted hash such as bcrypt.
Is MD5 or SHA-1 still safe?: Not for security. Collisions can be made for both. They are fine as checksums, but use SHA-256 or better for anything an attacker might target.
Why does a tiny change give a completely different hash?: Hash functions are built so that any change to the input changes about half the bits of the output. This is called the avalanche effect.