Checksum Calculator
Calculate file checksums and verify integrity. Files are processed locally in your browser.
Two ways to use this tool
Get a file's checksum: drop a file below and copy the hash.
Verify a download: drop the file, then paste the expected hash from the download page into the Verify box — we'll tell you if it matches.
Click to upload or drag and drop a file
Any file type supported
Have a hash from the download page? Paste it here and we'll check your file against it — no need to match algorithms by hand.
Where do you get the expected hash? Usually from the download page, a SHASUMS or CHECKSUM file, or the project's release notes.
About Checksums
- • Checksums verify file integrity and detect corruption or tampering
- • MD5 is fast but not cryptographically secure
- • SHA-256 is recommended for security-sensitive verification
- • Always verify downloads from untrusted sources
File Checksums - Technical Details
Checksums are hash values used to verify file integrity. Compare the hash of a downloaded file with the expected value to ensure it wasn't corrupted or tampered with during transfer.
Command-line Alternative
# Calculate checksums in terminal\nmd5sum filename.zip\nsha256sum filename.zip\n\n# On macOS\nmd5 filename.zip\nshasum -a 256 filename.zip