Calculate SHA-256 or SHA-512 for a file

Calculate SHA-256 or SHA-512 in chunks in a Web Worker, with progress, cancellation, multiple files and optional expected-hash comparison.

✓Local processing in this tool

Choose a file

The file is read locally to calculate its hash.

Choose file

Formats: any format · no artificial limit; practical limit depends on browser and device

Expected hash (optional)

Features

SHA-256

Widely used algorithm for integrity verification.

SHA-512

512-bit alternative calculated in chunks in a local Web Worker.

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Any format

It does not depend on the file extension or format. The file is read in chunks so it does not have to be loaded fully into memory.

What a hash is for

If two copies of the same file produce exactly the same hash with the same algorithm, that is strong evidence that their binary content matches. A hash does not encrypt the file and cannot be reversed to recover it.

Frequently asked questions

Which files are supported?

Any format is supported. Bytes are processed in chunks; the practical limit depends on the browser, device and processing time.

Is the file uploaded?

No. The file is processed in chunks in a Web Worker inside the browser.