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File Hash & Checksum Calculator

Calculate SHA-256, SHA-384, and SHA-512 cryptographic file checksums directly in browser memory.

Drop any file here to calculate hash

Files never leave your local device

SHA-256

SHA-512

Frequently Asked Questions

Can I hash large gigabyte files without uploading?

Yes. The Web Crypto API streams file blocks directly in local browser memory without uploading any bytes over the network.

What hash algorithms are available?

It provides instant calculation of NIST-standard SHA-256 and SHA-512 hashes.