确保文件与发布者提供的一致。

粘贴校验和，获得明确结果

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.

常见类型，直接读取

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.

下载完成前即可验证

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.

也可通过命令行验证

命令行工具get接受--checksum参数，并检查已完成的文件：校验和可以是十六进制代码，单独提供或指定名称，例如sha256:…。一个命令即可下载并检查文件：

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

命令行指南列出了get接受的所有参数。

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.