The download manager,rebuilt.
The parallel-segment Rust engine is just the start — every protocol from HTTP and BitTorrent to ED2K and HLS; every surface from desktop and browser to headless NAS; an open ecosystem of plugins and themes. A download manager is only its first job.
FluxDownNot a feature list — reasons to switch
Every one of these points at the same thing: a download experience that hadn't changed in a decade, redone properly.
Rust-Powered Engine
Built with Rust and Tokio for maximum throughput. Zero-cost abstractions deliver native performance while ensuring memory safety under heavy concurrent loads.
Multi-Protocol
HTTP, HTTPS, FTP, BitTorrent with magnet link support, ED2K (eDonkey) links, and HLS/DASH streaming. Each protocol has a dedicated, optimized engine — from HTTP Range requests to DHT peer discovery.
Speed Control
Token bucket-based global speed limiter. Set bandwidth limits to keep your browsing smooth while downloads run in the background.
Resume Anywhere
Full breakpoint resume support. All download state is persisted to SQLite — safely close and restart without losing a single byte.
Smart Segmentation
IDM-style intelligent segmentation with runtime dynamic splitting. Idle workers auto-take over slow segments, reuse connections, and maximize throughput.
Browser Integration
Chrome/Firefox extension with three-layer interception engine. Auto-detects streaming media (HLS/DASH), in-page resource sniffing, smart file type filters, one-click acceleration.
Beautiful Interface
Crafted with care — dark and light themes, 13 color schemes, responsive layout with resizable panels. A download manager that's actually pleasing to use.
Clean & Private
Zero ads, zero tracking, no account required. All data stays on your device — local-first architecture with SQLite persistence. Your downloads are your business.
Plugin System
An optional plugin layer written in JavaScript, running safely inside a sandboxed runtime. Link resolvers sniff out direct URLs, notification hooks trigger imperative retries, and the plugin market installs plugins in one click — content-addressed and fully verifiable.
Managed Components
Download and manage external tools like ffmpeg and yt-dlp on demand. Plugins invoke them inside a jailed sandbox for merging, transcoding, and stream extraction — no manual PATH setup, no polluting your system.
Community Speed Network
Downloads automatically pick the fastest route. FluxDown merges anonymous mirror speed measurements from the community into a shared routing map — the more people download, the faster everyone gets. No URLs, no file names, no identity: just which mirror is fast from which region.
Catch downloads seamlessly
Install the Chrome or Firefox extension to automatically intercept downloads and send them to FluxDown. Works with any website, configurable to your preferences.
One-Click Intercept
Automatic download catching or manual right-click menu integration for full control
Flexible Communication
Supports both NMH (Native Messaging Host) local communication and remote communication — no cloud, no tracking, your data always stays under your control
Smart Filters
Filter by file extension, domain whitelist/blacklist, and minimum file size threshold
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Ready to speed up?
Download FluxDown for your platform. Free, open source, ready to go.
Windows
Available Nowx64
Requires Windows 10 or later
Install via Scoop
Windows package manager — one command to install and stay up to date.
scoop bucket add fluxdown https://github.com/zerx-lab/FluxDown
scoop install fluxdown/fluxdownInstalls straight from the FluxDown repository bucket, always tracking the newest release. Update anytime with scoop update fluxdown.
Browser Extension
Intercept browser downloads and send them to FluxDown. Supports Chrome, Edge and Firefox. All extensions are officially listed on their stores.
For Chrome, Edge, Brave and other Chromium-based browsers
Support FluxDown
FluxDown is free and open source. Pick any amount — your support keeps development alive.
After payment, your sponsorship is automatically added to the GitHub sponsor wall. Fill in a name and message to be shown, or leave blank to be recorded as an anonymous sponsor. View all sponsors
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