Verify your files with a checksum
File Checksum Tool is a free, portable utility that calculates and verifies hash values for any file — MD5, SHA-1, SHA-256, SHA-384, SHA-512, and older algorithms like MD2 and HAVAL. Use it to confirm that a download or a copy is intact and hasn’t changed: generate a checksum for your file, or compare it against a published one.
It’s portable — there’s nothing to install. Run it from a folder or a USB stick.
Frequently asked
What is a file checksum? A checksum (or hash) is a short fingerprint calculated from a file’s contents. If two files have the same checksum they’re identical; if even one byte differs, the checksum changes — which makes it a reliable way to verify that a file downloaded or copied correctly.
Is it really free? Yes — File Checksum Tool is free to download and use.