Hash a downloaded file
file = (select any file)
Result: Select a file to see its SHA-512 hash.
File SHA-512 Hash Generator
Compute the SHA-512 hash (digest) of a file without uploading it to any server. The file is read locally using the FileReader API and hashed with the Web Crypto API. SHA-512 produces a longer digest than SHA-256, providing a larger security margin.
Privacy: this tool processes your data entirely in your browser. Nothing you paste or type is sent to the server.
Enter your values and press Calculate — the result appears here.
Worked examples
Frequently asked questions
Is my file uploaded to a server?
No. The file is read entirely in your browser using the FileReader API and hashed with the Web Crypto API. Nothing is transmitted anywhere.
SHA-256 vs SHA-512 - which should I use?
Both are secure. SHA-256 is more widely used (Bitcoin, TLS certificates). SHA-512 produces a longer digest (128 hex chars vs 64) and can be faster on 64-bit CPUs. Use whichever your verification source provides.
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