IDM-CLI

A lightning-fast, cross-platform command-line download manager written in Python.

The official IDM asks you to pay after 30 days — IDM-CLI is 100% free, open-source, and yours to modify!

Download via PyPI · Report a Bug

IDM-CLI splits files into multiple parallel chunks (default 8, up to 32) to maximize your internet speed. It supports downloading from YouTube, Facebook, Instagram, and any Direct File URL (.exe, .zip, .pdf, etc.).

Features

• Parallel Chunk Engine — Splits downloads into multiple concurrent chunks using curl-cffi async sessions to fully saturate your bandwidth.
• Universal Downloader — Paste any URL. yt-dlp handles 1000+ sites (YouTube, Facebook, Instagram, etc.), with automatic fallback to direct HTTP download for unsupported URLs.
• Audio Only / MP3 Conversion — Download videos as audio. IDM-CLI automatically grabs the best audio stream and uses FFmpeg to convert it to .mp3.
• Smart Auto-Resume — Internet dropped? Pressed Ctrl+C? No problem. IDM-CLI remembers the exact byte positions of all incomplete chunks. Paste the same link again to resume instantly.
• Persistent Queue System — Add multiple files to a queue with -Q and type start queue to download them all sequentially.
• Interactive UI — Modern terminal interface powered by rich and questionary with real-time speed, ETA, and progress bars. Press p to pause, r to resume.
• Cross-Platform — Works on Windows, macOS, and Linux with platform-specific FFmpeg handling.
• Auto-Update Check — Checks PyPI once a day and notifies you when a new version is available.

Prerequisites

• Python 3.8+
• FFmpeg — Required for muxing video and audio streams, and converting to .mp3. IDM-CLI can auto-download it for you, or you can install it manually:
  • Windows: winget install ffmpeg
  • macOS: brew install ffmpeg
  • Linux: sudo apt install ffmpeg

Installation

# From PyPI
pip install idm-cli

# From source
git clone https://github.com/rj41-w2/idm-cli.git
cd IDM-CLI
pip install -r requirements.txt
pip install -e .

Usage

Run the app interactively:

idm

This opens a prompt where you can paste your link, select video quality, or queue the download.

CLI Flags (Fast Mode)

Skip the interactive menus by passing arguments directly:

# Download a video at 1080p
idm "https://youtube.com/watch?v=..." -q 1080p -v

# Audio only (converts to MP3)
idm "https://youtube.com/watch?v=..." -a

# 16 parallel chunks for maximum speed
idm "https://example.com/largefile.zip" -c 16

# Add to queue
idm "https://facebook.com/..." -Q

Flag	Description
-q <resolution>	Set video quality (e.g., 1080p, 720p)
-a	Audio only — download and convert to MP3
-v	Download video + audio (bypasses quality prompt)
-Q	Add to queue instead of downloading immediately
-c <num>	Number of parallel chunks (default: 8)
-f <filename>	Force a custom output filename

Interactive Commands

Command	Description
<URL>	Download a video or file
resume	Resume or delete incomplete downloads
start queue	Process all queued downloads
help	Show available commands and flags
exit	Exit the application

Troubleshooting: Windows Device Guard

If you get "idm.exe was blocked by your organization's Device Guard policy", run the Python module directly:

python -m idm_cli

Architecture

idm_cli/
├── __init__.py              # Package version (currently 1.3.3)
├── __main__.py              # python -m idm_cli entry point
├── config.py                # Platform-aware config, logging, and paths
├── update_checker.py        # PyPI version check
├── ui/
│   ├── cli.py               # Typer entry point and interactive command loop
│   ├── prompts.py           # Questionary prompts and user-facing messages
│   ├── progress.py          # Rich progress display and pause/resume controls
│   └── utils.py             # URL validation, filename safety, and terminal helpers
├── downloader/
│   ├── core.py              # Download orchestration and destination management
│   ├── downloader.py        # Async ranged downloads, retries, and resume validation
│   ├── handlers.py          # Queue & resume handlers
│   ├── muxer.py             # FFmpeg verification, muxing, and conversion
│   └── state.py             # Locked, atomic JSON state persistence
├── extractors/
│   ├── __init__.py           # Direct HTTP probe and extractor selection
│   ├── ytdlp.py             # YouTube/social media extractor
│   ├── direct.py             # Direct HTTP file metadata and URL extraction
│   └── winget.py             # Windows Package Manager metadata extraction
└── tests/
    ├── test_core.py          # State, config, extractor, and utility tests
    └── test_regressions.py   # Downloader and URL validation regression tests

The download flow is: cli.py selects the extractor, core.py prepares the destination and media pipeline, downloader.py downloads validated byte ranges, progress.py renders live progress, and muxer.py creates the final media file. Interrupted downloads are tracked under the platform-specific application data directory, not inside the repository.

Contributing

Contributions are welcome. Fork the repo, make your changes on a feature branch, and open a PR against main. Keep changes focused and follow the existing code style.

For bug reports and feature requests, open an issue.

License

This project is licensed under the MIT License.