Guide1 min readUpdated July 1, 2026

How to generate a hash (MD5, SHA-256)

Short answer

Paste your text into a hash generator and choose an algorithm like SHA-256. It returns a fixed-length fingerprint of the input. The same input always yields the same hash, but you cannot reverse a hash back to the input.

What a hash is

A hash function turns any input into a fixed-length string that acts as a fingerprint. Change one character and the output changes completely. It is one-way: you cannot compute the input from the hash. See what is a hash function.

Generate a hash

Enter the textType or paste the string you want to hash.
Pick an algorithmSHA-256 is the safe default; MD5 and SHA-1 are legacy.
Copy the resultThe hash is a fixed-length hex string, ready to store or compare.

Try it: Hash GeneratorHash text with MD5, SHA-1, SHA-256, or SHA-512 locally — nothing is uploaded.Open tool

Do not use MD5 or SHA-1 for securityBoth are broken for collision resistance. Use them only for non-security checksums. For integrity or password-adjacent uses, prefer SHA-256 or stronger — and for passwords specifically, a dedicated algorithm like bcrypt or Argon2.

What hashing is used for

Verifying a file downloaded without corruption (checksums)
Detecting whether two inputs are identical without storing them
Indexing and deduplication by content fingerprint
Building blocks for signatures and message authentication

References

Questions

Can you reverse a hash?

No. Hashing is one-way by design. Attackers can only guess inputs and hash them to see if they match, which is why weak or unsalted hashes of common values are still risky.

Which hash algorithm should I use?

Use SHA-256 as a general default. Avoid MD5 and SHA-1 for anything security-sensitive because they are vulnerable to collisions. For passwords, use bcrypt, scrypt, or Argon2 rather than a plain hash.

Does this send my data anywhere?

No. Utilumo's developer tools parse and transform input inside the browser tab. Nothing is uploaded, stored, or logged.