Linux Download Manager (LDM)

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A free download manager and accelerator, an Internet Download Manager (IDM) alternative for Linux, Steam Deck and Windows. It downloads with multiple connections, resumes interrupted downloads and grabs videos from any site with a button on top of the player.

Download

System	File
Linux (x86_64)	Linux_Download_Manager-x86_64.AppImage
Windows 10/11	Lunix_Download_Manager-Setup.exe or portable.zip

• Linux: chmod +x the file and run it. Needs glibc 2.38+ (SteamOS, Ubuntu 24.04+, Mint 22+, Fedora 39+, Debian 13, Arch). To add a menu entry: ./Linux_Download_Manager-*.AppImage install.
• Windows: the app is called Lunix Download Manager. SmartScreen warns on first run: More info → Run anyway.

Browser extension

Required for capturing downloads and for the video button. It ships with the app; LDM reminds you on first run and shows the folder under ☰ → Help → Browser extension.

1. Open chrome://extensions (Chrome, Brave) or edge://extensions (Edge).
2. Turn on Developer mode.
3. Click Load unpacked and pick the extension folder.

Firefox: about:debugging#/runtime/this-firefox → Load Temporary Add-on → manifest.json (removed when Firefox restarts).

To check it, click the LDM icon in the browser toolbar: it should say "connected". Files of 50 MB or more go to LDM; Alt+click lets the browser download, Ctrl+Alt+click forces LDM.

Features

• Faster downloads: multiple connections with dynamic segmentation, resume after a drop or reboot, HTTP/HTTPS/FTP, proxy and speed limiter.
• Videos: "Download this video" button on any player, quality choice, MP3, subtitles and playlists; YouTube and ~1,800 sites via yt-dlp, plus HLS/DASH capture.
• Organization: categories, queues, scheduler, shut down when done, IDM list import.
• Site Grabber, tray icon, start with the system, dark and light themes.

Button on the player	Quality choice	Progress

For developers

python3 ldm.py                              # run from source (Python 3.10+, GTK 3 / PyGObject)
python3 -m unittest discover -s tests       # tests
python3 linux/build_appimage.py             # AppImage (Ubuntu 24.04) into linux/dist/

Windows builds come from GitHub Actions (windows/, MSYS2 + PyInstaller + Inno Setup).

ldm/               app code (engine, video, local API, GTK UI)
browser_extension/ MV3 extension (Chrome, Edge, Firefox)
linux/             AppImage build
windows/           Windows build

License

MIT. Independent project, not affiliated with Tonec Inc. or Internet Download Manager. Bundles yt-dlp (Unlicense), FFmpeg (GPL-3.0), Deno (MIT), GTK/PyGObject (LGPL) and the Inter and JetBrains Mono fonts (OFL).