No upload, 100% local, no account

Hash Generator

Compute cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512) from any text or file. Everything runs locally, no upload.

How Hash Generator works

Hash generator computes MD5, SHA-1, SHA-256 and SHA-512 digests from text you type or from any file you drop, in real time for text, and via the Web Crypto API for files. Hashes are used to verify file integrity, generate fingerprints or store passwords (for the right algorithm).

An important honesty note: MD5 and SHA-1 are no longer considered collision-resistant and should not be used for security-critical purposes such as digital signatures or password storage. SHA-256 and SHA-512 remain strong for those use cases. SHA-1/256/512 use the Web Crypto API while MD5 uses a built-in pure-JavaScript routine, and only the hex digest is shown.

Frequently asked questions

Are my files uploaded to a server?

No. Hashing runs in your browser tab, text and dropped files are read into memory on your own device, then SHA-1/256/512 are computed with the Web Crypto API (crypto.subtle.digest) and MD5 with a built-in pure-JavaScript routine. Only the hex digest is shown. Nothing reaches Sunasty or any third party. Open your browser's DevTools, go to the Network tab and watch: no request carries your file.

Are MD5 and SHA-1 safe to use for security purposes?

No. MD5 and SHA-1 are cryptographically broken, collisions (two different inputs producing the same hash) have been demonstrated in practice. They remain useful for non-security checksums and legacy compatibility checks, but you should use SHA-256 or SHA-512 for any security-sensitive purpose.

How is hashing different from encryption?

Hashing is a one-way function: you cannot recover the original input from a hash. Encryption is reversible with the right key. Use a hash to verify that a file has not changed; use encryption if you need to protect and later recover the original data.

Does it work offline?

Yes, once the page has loaded. Because the processing happens on your device, you can disconnect from the network and the tool keeps working. This is the clearest proof that your data never leaves your machine.

Is it free? Do I need an account?

It is completely free and requires no sign-up. There are no watermarks, no daily limits and no tracking cookies needed to use the tool.