What does a checksum mismatch mean?

A mismatch means the file has been modified, partially downloaded, corrupted during transit, or is not the file published by the author.

Does this tool upload my file anywhere?

No — hashing runs entirely client-side using Web Crypto.

Verify a downloaded file’s integrity by comparing its SHA-1, SHA-256 or SHA-512 hash against an expected checksum.

SHA-1 SHA-256 SHA-512

Choose a file

Drop a file, paste, or click to browse

Expected Hash / Checksum

Files never leave your device — hashing runs entirely in your browser.

1
Choose your file

Up to 200 MB.
2
Enter expected checksum

Paste the hash provided by the software publisher or download page.
3
Instant verification badge

Checks case-insensitively whether the file matches byte-for-byte or has been corrupted.

What does a checksum mismatch mean?: A mismatch means the file has been modified, partially downloaded, corrupted during transit, or is not the file published by the author.
Does this tool upload my file anywhere?: No — hashing runs entirely client-side using Web Crypto.