File Checksum Calculator
Calculate and verify file checksums entirely in your browser. Your files are never uploaded.
Processed in your browser. Nothing is sent to the server.
What is a File Checksum?
A file checksum is a unique hash value generated from file contents. Even a single bit change produces a completely different hash. By comparing checksums after downloading software, you can verify that the file hasn't been tampered with.
All processing happens in your browser using the Web Crypto API's crypto.subtle.digest(). Your file contents are never sent to any server.
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FAQ
Is my file uploaded to a server?
No. The file is read and processed entirely in your browser using the Web Crypto API. No data leaves your device.
How do I verify a downloaded file?
1. Select the downloaded file. 2. Copy the expected hash from the software's website. 3. Paste it in the verify field. If they match, the file hasn't been tampered with.