File Hash Calculator

Compute SHA-1, SHA-256, SHA-384, and SHA-512 hashes of any file entirely in your browser. No server upload.

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About this tool

Select or drop any file to instantly compute its cryptographic hash using the browser's built-in Web Crypto API. The file is read locally — nothing is uploaded to a server.

Use cases

Verify a downloaded file matches the publisher's checksum
Check two files are identical without opening them
Generate a hash for integrity metadata (e.g. integrity attributes, release notes)

Algorithms

SHA-256 — most common for file verification
SHA-512 — stronger, used in security-sensitive contexts
SHA-384 — common for Subresource Integrity (SRI)
SHA-1 — legacy; avoid for security purposes, shown for compatibility