Hash generator (SHA)

Compute the SHA-1, SHA-256, SHA-384 or SHA-512 hash of text or a file and verify a checksum. The file never leaves your device.

Free
No sign-up
No file uploaded
Windows, Mac, Android, iPhone

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About this tool

Get the hash of text or a file to verify a download, compare two versions or prepare a test. Hashing uses Web Crypto, built into your browser: even a large file is never uploaded.

How to use

Type text or choose a file.
The four hashes appear immediately.
Paste the expected hash to check it matches.

Common problems and fixes

My hash does not match the website's

Check the algorithm (SHA-256 and SHA-1 differ) and that the downloaded file is complete.

The text hash differs from my code's

A trailing newline or an encoding other than UTF-8 changes the whole hash.

I am looking for MD5

MD5 is no longer secure and browsers do not provide it. Use SHA-256, the current standard.

Frequently asked questions

Can a hash be reversed?

No, it is a one-way function. But a short password can be brute-forced: do not hash passwords with plain SHA.

Which algorithm should I choose?

SHA-256 for most uses. SHA-1 is no longer considered collision-resistant.

Is my file uploaded?

No, it is read and hashed by your browser.

Why is the website's checksum in uppercase?

Hexadecimal is case-insensitive: the comparison ignores case.

Still stuck?

Ask on the forum: the category, the tool, your device sheet and the test result will be filled in for you.