Assurez-vous que c’est bien le fichier publié.

Collez-la, obtenez une réponse claire

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.

Les types courants, lus tels quels

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.

Demander avant que ce soit fait

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.

Également depuis la ligne de commande

La ligne de commande get prend --checksum et vérifie le fichier terminé : le code en hexadécimal, seul ou nommé, comme dans sha256:…. Une commande télécharge le fichier et le vérifie :

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

Le guide de la ligne de commande liste tout ce que get prend.

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.