File Hash Calculator
Get the SHA-256, MD5 or other checksum of a file.
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Runs on your device. No upload wait.
Questions
How do I verify a download with a checksum?
Drop the downloaded file here, then paste the checksum from the website into “Compare with”. If they match, the file arrived complete and unchanged. SHA-256 is the most common checksum today.
Which algorithm should I use?
SHA-256 for anything security-related. MD5 and SHA-1 are broken for security purposes (collisions can be made on purpose) but are still fine for spotting accidental corruption, and many sites still publish them. CRC-32 is a quick error check, used inside ZIP files.
Is there a size limit?
No, for MD5, SHA-1, SHA-256 and CRC-32: files are read in pieces, so even multi-gigabyte disk images work. SHA-512 uses your browser’s built-in code, which needs the whole file in memory, so it’s offered for files up to 1 GB.
Is my file uploaded to calculate the hash?
No. The file is read and hashed inside your browser. That’s what makes it safe to check private files, and it works offline.
Is it free? Do I need an account?
It is free to use and there is nothing to sign up for. There are no watermarks and no daily limits.
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