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File Hash / Checksum Checker
Drop in any file to compute its SHA-256, SHA-1, SHA-384, SHA-512 or MD5 checksum using the browser's Web Crypto API, then paste a published checksum to verify the file is intact and untampered. The file is hashed locally and never uploaded.
Compare with expected checksum (optional)
🔒 This tool runs entirely in your browser. Your data is never uploaded.
Frequently asked questions
How do I verify a download?＋
Compute the file's checksum here, then compare it with the checksum published by the source. If they match, the file is intact and hasn't been altered.
Which algorithms are supported?＋
SHA-256, SHA-1, SHA-384 and SHA-512 via the browser's Web Crypto API, plus MD5. SHA-256 is the usual choice.
Is my file uploaded?＋
No — the file is read and hashed entirely in your browser and never leaves your device.