Убедитесь, что это тот файл, который они опубликовали.

Вставьте, получите простой ответ

A checksum is a short code worked out from a file's contents, published so you can tell that the copy you downloaded is the right one. Right-click a download in the list, choose Verify checksum... and paste the code from the site. GDM answers The file matches or The file does NOT match. Nothing to install, and no command to type.

Распространённые типы, читаются как есть

GDM reads MD5, SHA-1, SHA-256, SHA-512 and CRC32 checksums. Paste the code as the site shows it: there is no list to pick the kind from, as GDM tells them apart by their length.

Спросите до завершения

A finished file is checked at once. Ask while it is still downloading, and GDM checks it when the download ends. You can paste the code as soon as the download starts, and come back to the answer.

Также из командной строки

Команда get в командной строке принимает --checksum и проверяет завершённый файл: код в шестнадцатеричном формате, отдельно или с именем, как в sha256:…. Одна команда загружает файл и проверяет его:

misterdownloadmanager-cli get https://example.com/big.iso -o D:\Downloads --checksum sha256:9f86d0…

Руководство по командной строке содержит список всех параметров, которые принимает get.

GDM checks its own downloads too

The same care goes into what GDM fetches for itself. The helpers it can install for videos are verified before they run: yt-dlp against its developers' signing key, ffmpeg against its published checksums. GDM's own updates install only files listed in a checksum list signed with GDM's release key, which every release carries.