File Hash Calculator

Compute SHA-1, SHA-256, SHA-384, and SHA-512 cryptographic hashes of any file entirely in-browser using the Web Crypto API — nothing is uploaded; supports drag-and-drop and hash verification.

Drop a file here or click to browse

All file types accepted — processed locally

Your file never leaves your browser. All computation happens locally using the Web Crypto API.

File Hash Calculator

Compute SHA-1, SHA-256, SHA-384, and SHA-512 cryptographic hashes of any file entirely in-browser using the Web Crypto API — nothing is uploaded; supports drag-and-drop and hash verification.

Common uses

  • Verify a downloaded ISO's SHA-256 checksum
  • Hash a config file to detect tampering

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Frequently asked questions

How do I verify a downloaded file's checksum?

Drop the file onto the File Hash Calculator, then paste the publisher's expected hash to compare it with the computed SHA value.

Which hash algorithms are supported?

SHA-1, SHA-256, SHA-384 and SHA-512, computed with the Web Crypto API.

Is the file uploaded to compute the hash?

No. Hashing runs in your browser using the Web Crypto API, so the file stays on your machine.

How is this different from sha256sum or Get-FileHash?

It computes the same SHA digests without a command line, which is handy on machines where you can't run those commands.

Is my data uploaded to a server?

No. This tool runs entirely in your browser — your input is processed locally on your device and is never uploaded or stored on a server.