Generate a hash
Drop the file you just downloaded, compare the hash with the one published on the download page, and you know whether it arrived intact — without sending the file anywhere.
- Runs entirely in your browser
- Works offline
- No upload
- No sign-up
- No watermark
Loading the tool…
How it works
- Type text, or drop a file.
- Pick the same hash type (algorithm) the download page lists.
- Compare the two strings.
Why nothing is uploaded
Every operation on this page is done by code running inside your browser tab, using the same engine that renders web pages. The file is read from disk into your tab’s memory, transformed there, and written back out as a download. It is never sent anywhere — not to us, not to a third party.
Verify it yourself
- Open your browser’s developer tools (F12) and select the Network tab.
- Load your file and run the tool.
- The only requests you will see fetch the tool’s own code — and, for a few heavy tools, their open-source engine from a public CDN — plus one small page-view ping to loreatec.jp (page address and title, nothing more). None of them carry your file.
Frequently asked questions
MD5 is broken — why is it here?
Because many download pages still list MD5, and you cannot compare against a hash you cannot compute. It is unsafe for security purposes (an attacker can make two different files with the same MD5) but perfectly good at spotting a cut-off or corrupted download.
Is a large file uploaded to be hashed?
No. The browser has a built-in function for the SHA hashes, and MD5 is a few dozen lines of code in this page. The file is read from your disk and never sent.