File Checksum
The file is hashed in your browser using the Web Crypto API — it is never uploaded, so large ISOs are fine.
Runs in your browser
Security & crypto
Drop a file here, or
Hashed locally with the Web Crypto API — the file is never uploaded, so large ISOs are fine.
Checksums
Verify against a published checksum
Paste the value from the vendor's site to confirm the file is intact.