About File Hash Calculator
Calculate a file's MD5, SHA-1 and SHA-256 checksums in your browser to help verify downloads, compare files and investigate unexpected file changes.
What a file hash tells you
A cryptographic hash maps file bytes to a fixed-length value. If the contents change, the resulting hash will usually change too, so comparing checksums can help you check whether two files have identical content or whether a download matches a checksum supplied by a trusted publisher.
A matching hash is useful only when the reference checksum comes from a trustworthy source. A hash calculator does not independently prove who created a file or whether the file is safe to open.
MD5, SHA-1 and SHA-256
MD5 and SHA-1 remain common in older checksum lists and compatibility workflows, but they are not recommended for security-sensitive collision-resistance needs. SHA-256 is generally the better choice when a publisher provides a SHA-256 checksum.
For a reliable comparison, calculate the hash of the downloaded file and compare the complete value with the checksum published by the software vendor or other trusted source. Check that you selected the correct algorithm and copied every character.
Check files without uploading them
The calculator reads the selected file in the browser and computes its digest locally. The selected file does not need to be uploaded to a My Karya Kit processing server. Very large files can be limited by browser memory and device resources.
A checksum is an integrity aid, not a malware scan. Keep security software enabled and download files from trusted sources.