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

Frequently asked questions

Can I use File Hash Calculator to verify a downloaded ISO's SHA-256 checksum?

Yes. File Hash Calculator can verify a downloaded ISO's SHA-256 checksum, directly in your browser.

Can I use File Hash Calculator to hash a config file to detect tampering?

Yes. File Hash Calculator can hash a config file to detect tampering, directly in your browser.

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.