File Checksum Verifier
Compute the SHA-256 checksum of any file in your browser and compare it against an expected value to verify it hasn't been altered or corrupted.
Frequently asked questions
Is this tool free?
Yes. Calchemy tools are free to use in your browser.
Is my file uploaded anywhere?
No. The file is read and hashed entirely on your device using your browser's built-in cryptography - it never leaves your computer.
Why would I check a file's checksum?
To confirm a downloaded file matches the checksum published by its source, which helps catch corrupted downloads or tampered files.
What hash algorithm does this use?
SHA-256, the most common algorithm publishers use for verifying file integrity today.
What if the checksums don't match?
The file may be corrupted, incomplete, or not the exact file the publisher intended - it's safest to re-download it from the original source.