LOD Zephyrus Download Manager's main window in day mode: web and torrent downloads in one list, with categories, sizes, progress, speeds and dates. — The real app, version {{VERSION}} on Windows 11 · every screenshot on this site is unretouched.

LOD Zephyrus Download Manager's main window in night mode: web and torrent downloads in one list. — The real app, version {{VERSION}} on Windows 11 · every screenshot on this site is unretouched.

LOD Zephyrus Download ManagerFree and open source · GPL-3.0

The download manager you already know. Rebuilt to be faster.

The free, open-source IDM alternative. Every connection at once, crash-safe resume, torrents and video in one list.

macOS and Linux to try.

Browser extension: Add to Firefox Add to Chrome, for Edge, Brave and Opera too. Chrome Edge Brave Opera

Zephyrus {{VERSION}}

Every window, rebuilt.

The one you know, down to the pixel. With torrents, video and 86 languages it never had.

The download progress window: a file over eight connections, each one's share drawn as it fills. — **Every connection, live** Each connection drawn as it fills, with the speed and the time left. Crash-safe resume picks up where it stopped.

Everything in the box.

Each feature has a page of its own, with the real window, where to find it, and what it can't do yet.

Faster than IDM. Timed to the millisecond.

Our benchmark, replayed: the same PC, the same test server, the median of alternating runs.

LOD Zephyrus Download Manager

0.00 sReady

Internet Download Manager 6.42

0.00 sReady

5.4×faster

Played in real time.

Every run and the raw data

1 GiB: Zephyrus 1.01 s, IDM 5.46 s. A 256 KiB file: Zephyrus 0.03 s, IDM 3.14 s. A server that allows two connections: Zephyrus 12.6 s on 2 connections, IDM 15.9 s after opening 480.

Get LOD Zephyrus Download Manager {{VERSION}}

Free for everyone, forever. No sign-up, no ads, nothing bundled.

Delivery optionsVersion {{VERSION}} · free for everyone

Windows 10 and 11

StableRecommended

Installer
setup.exe — connects your browsers

Portable
portable.zip — runs from a folder or USB stick

Needs
64-bit Windows 10 or 11, about 100 MB

Download the installer
macOS 11 and later

Experimental

Apple Silicon
.dmg for M1 and later

Intel
.dmg for Intel Macs

First start
right-click the app → Open (not notarized yet)

Download for Apple Silicon
Linux x86-64

Experimental

AppImage
any distribution: make it executable, run it

Packages
.deb for Debian and Ubuntu, .rpm for Fedora

Or
.tar.gz to unpack anywhere

Download the AppImage

The browser extension, from the browsers' own stores: the Chrome Web Store's is for Edge, Brave, Opera and Vivaldi too. It also comes with the app and as its own download, to add by hand. Every file is built from the public source by GitHub Actions and listed with its SHA-256 checksum.

All files and install steps Every release on GitHub

Works with what you already use

Your browsers hand it their downloads, and proven open-source tools do the specialist work. Set up the extension.

Browsers

ChromeGoogle · Add to Chrome
EdgeMicrosoft
Brave
Opera
Vivaldi
FirefoxMozilla · Add to Firefox

Protocols

HTTPand HTTPS
FTPand FTPS
BitTorrentDHT and trackers
Magnetlinks
SOCKS5and HTTP proxies
PACproxy scripts
IDMlist import

Built on

yt-dlpvideo from thousands of sites
ffmpegmerges picture and sound
librqbittorrent engine
rustlsencryption

86 languages, right to left too

The app comes in 86 languages, every one Windows 11 offers. It follows your computer's language, and you can switch any time in View → Language.

Most translations were made by machine and are waiting for a native speaker. Help with yours.

English
العربية
Français
Deutsch
Español
日本語
Português
Русский
हिन्दी
Türkçe
فارسی
简体中文
+ 74 more

LOD Zephyrus Download Manager and IDM, side by side.

Internet Download Manager is the long-established paid download manager for Windows, and the design we grew up with. Here is what can be checked. Where it's ahead, we say so.

LOD Zephyrus Download Manager vs IDM 6.42Checked October 2026 · sources below

	LOD Zephyrus Download Manager	Internet Download Manager
Price	Free	Paid licence after a 30-day free trial¹
Source code	Open (GPL-3.0)	Closed
1 GiB over a fast link	1.0 s	5.5 s²
A 256 KiB file	0.03 s	3.1 s²
Server allowing 2 connections	Uses 2, done in 12.6 s	Opened 480, done in 15.9 s²
Torrents and magnet links	Yes	Not offered on its website³
Video from web pages	Yes, via yt-dlp	Yes, from web players³
FTP and FTPS	Yes	Yes³
Interface languages	86, built in	About 40, as separate downloads³
Browser extensions	Firefox, Chrome, Edge, Brave, Opera, Vivaldi	Chrome, Firefox, Edge³
Systems	Windows 10/11; macOS and Linux to try	Windows³
Maturity	New	Refined over many years

"Try IDM 30-days free trial" — internetdownloadmanager.com; prices at its purchase page
Our benchmark: IDM 6.42 (licensed copy) and Zephyrus on the same PC, against the same local test server, in alternating runs; medians, Mann-Whitney p < 0.001 · charts, report and raw data
internetdownloadmanager.com: supported Windows versions, browser extensions, video, FTP, scheduling and translations; no mention of BitTorrent or magnet links

Zephyrus as an IDM alternative Spot something wrong? Tell us

In short

LOD Zephyrus Download Manager (Zephyrus) is a free, open-source download manager for Windows 10 and 11, with builds for Linux and macOS. It looks and works like Internet Download Manager (IDM), but it is free (GPL-3.0), downloaded a 1 GiB file 5.4 times faster than IDM 6.42 in our published benchmark, and also downloads torrents, magnet links and videos from web pages. A browser extension for Chrome, Edge, Brave, Opera, Vivaldi and Firefox hands downloads to it.

LOD Zephyrus Download Manager {{VERSION}}The facts

Price: Free forever, no ads, no trial
Licence: Open source, GNU GPL 3.0
Systems: Windows 10/11; macOS and Linux to try
Downloads: HTTP(S), FTP(S), torrents, magnets, video pages
Speed: Up to 128 connections per file, re-split as they go
Languages: 86, right to left included
Privacy: The app has no accounts, telemetry or tracking
Version: {{VERSION}}

Zephyrus {{VERSION}}

Built in the open

Report what's broken, ask for what's missing, fix a translation or send a pull request. The maintainer reads every issue.

Found a bug? Help → Report a problem in the app opens an issue with your version, system and language filled in. Read it, then post it.

Star it on GitHub Report a bug Contribute Translate

Support Zephyrus

Zephyrus is free and always will be. If it saves you time, you can support its creator on GitHub Sponsors.

Sponsor on GitHub

A few things to know before you start.

Is it really free?

Yes. It's open source under the GNU GPL, version 3. No trial, no paid edition, no registration key, no nag screen, no ads. More

Is it IDM?

No. It's an independent project with no connection to Tonec Inc. It's written from scratch in Rust and contains none of IDM's code or artwork. The layout follows the classic download manager because that's what many people know and like. More

Is it safe to install?

The whole source is public, and every release is built from it on GitHub's servers. No adware, no spyware, no bundled offers. The helpers it downloads for video are verified before they run. More

Can I move my downloads over from IDM?

Yes: export your list from IDM, then choose Tasks → Import → From IDM export file in Zephyrus. More

Which browsers work with it?

Firefox, Chrome, Edge, Brave, Opera and Vivaldi through the extension, from Firefox's add-ons store and the Chrome Web Store. Without the extension, copy a link and Zephyrus opens the download window. More

Mac or Linux?

Yes: every release has an AppImage, .deb, .rpm and .tar.gz for Linux and a .dmg for Apple Silicon and Intel Macs. Today's are marked experimental; from version 0.5.0, Linux isn't, after checks on four desktops, and macOS stays experimental. More

Where can I get help?

The user guide covers every window, with step-by-step tutorials. Something broken? Open an issue on GitHub, or use Help → Report a problem in the app.

All questions Troubleshooting Report an issue

Your next download, faster.

Free and open source. Install it, click a link, and watch every connection at work.

Installation help User guide Report an issue

LOD Zephyrus Download ManagerFree and open source · GPL-3.0

Delivered1 GiB in 1.01 s

Zephyrus {{VERSION}}

The download manager you already know. Rebuilt to be faster.

Every window, rebuilt.

Everything in the box.

Faster than IDM. Timed to the millisecond.

Get LOD Zephyrus Download Manager {{VERSION}}

Windows 10 and 11

macOS 11 and later

Linux x86-64

Works with what you already use

Browsers

Protocols

Built on

86 languages, right to left too

LOD Zephyrus Download Manager and IDM, side by side.

In short

Built in the open

Support Zephyrus

A few things to know before you start.

Your next download, faster.