Download up to 32 times in parallel, pause and resume anytime, schedule downloads for the night and save videos from 1,000+ sites in the quality you pick. No ads, no account, no tracking.
Download links always fetch the latest release from GitHub. Every file is listed with its SHA-256 on the release page. Installation help: Install guide.
Features
Everything you expect from a download manager
An open-source alternative to Internet Download Manager (IDM), built natively for each system with the same features on both.
Faster downloads
Each file is split into parts that download at the same time, with up to 32 connections. Finished connections help the slowest part, so all stay busy to the end.
Pause and resume
Stop and continue later, even after you quit the app or restart the computer. A file that changed on the server is downloaded again instead of mixed up.
Refresh expired links
Right-click a download, choose Refresh Link and paste a fresh link. It continues where it stopped, without starting over.
Browser integration
Click a download link in Chrome, Edge, Brave, Opera or Firefox and a compact window shows name, size, category and folder. If the app isn't running, the browser simply keeps the download.
Video downloads
Save videos from YouTube, Instagram, Facebook, X, TikTok and 1,000+ sites in the quality you pick, up to 4K/8K, or sound only.
Automatic categories
Files are sorted into Compressed, Documents, Music, Video, Programs and Images, each saved in its own folder. Browse All, Unfinished and Finished.
Scheduler and queues
Start a queue at night, stop it in the morning, run downloads one by one or a few at a time, then quit, sleep or shut down when done.
Batch, grabber and clipboard
Download numbered series like img[001-100].jpg, every file linked from a page, or links you copy. Paste several links at once.
Speed limits and proxy
Limit speed for all downloads or just one, use a proxy, sign in to password-protected files and verify checksums.
Command line
Add downloads from scripts with ndm <link>, including queues, folders and limits. Run ndm help for every option.
Updates inside the app
New versions appear when you open the app, with what's new, Update Now, Remind Me Later or Skip. Each update is verified before it installs.
Private by design
No account, no ads, no tracking. Your downloads, cookies and passwords stay on your computer, protected for your user only.
How it works
Up and running in a minute
Three steps, and every download link you click goes through Nexonic.
Install the app
Download it for Mac or Windows and open it once, so it can register with your browsers.
Add the extension
Add the browser extension to Chrome, Edge, Brave, Opera or Firefox. It takes about 30 seconds.
Click any download
Click a link or the Download this video button. Pick the folder or quality and press Start Download.
Browser hand-off
A download window the moment you click
The extension hands the link to the app with its cookies and referrer, so downloads from sites where you are signed in just work.
Name, size, category and folder before you start
Start Download, Download Later or Cancel
No duplicates: a link already downloading is shown, not added twice
Right-click any link → Download with Nexonic
Live progress
See every connection at work
Each download gets its own progress window, and several can run side by side.
Speed, time left and a live speed graph
Start position and progress of each connection
Pause, Resume and Cancel from the window
Resume capability shown before you rely on it
Video downloads
Save videos in the quality you choose
Point at a video and click Download this video, or paste the page link into Add URL. The qualities the video offers are listed with their approximate size.
2160p (4K)1440p1080p720p480pSound only
YouTube, Instagram, Facebook, X, TikTok, Vimeo and 1,000+ sites
Streamed video (.m3u8) downloaded in parallel and saved as one .mp4
The video engine updates itself every day
Videos that need sign-in: send them from your browser while signed in
Copy-protected services are not supported. Only download what you have the right to save, and respect each site's terms.
Screenshots
Native on Mac and Windows
The same features on both systems, in light and dark mode. Click any picture to enlarge it.
Main windowCategories, queues and live statusDark modeFollows your system settingFrom the browserName, size, folder, StartProgress windowSpeed graph and connectionsSchedulerStart and stop queues on timeBatch downloadNumbered series in one go
Main windowToolbar, categories and queuesFrom the browserName, size, folder, StartProgress windowSpeed graph and connectionsAdd URLLinks, folder and queueSchedulerStart and stop queues on timeBatch downloadNumbered series in one go
Install guide
Installing and first launch
Updating? Install the new version over the old one; your downloads and settings are kept. Or use Update Now inside the app.
Mac
Quickest: run the one-line Terminal command from Download. No warning appears.
Or open the .dmg, click Agree and drag the app onto Applications.
The first time, macOS says it could not verify the app, because it is free and not sold through Apple. Allow it once with the three steps below.
If macOS says the app is damaged, run this in Terminal, then open it again:
If Windows says Windows protected your PC, click More info → Run anyway.
Choose I accept the agreement and follow the steps.
No install wanted? Unzip the portable version and run NexonicDownloadManager.exe.
Chrome, Edge, Brave, Opera
Open the app once.
Unzip NexonicExtension-Chrome.zip.
Open the extensions page (chrome://extensions, edge://extensions…) and turn on Developer mode.
Click Load unpacked and pick the unzipped folder. Restart the browser.
Firefox
Open the app once.
Click the Firefox add-on link in Firefox, or drag the .xpi onto a Firefox window.
Click Add when Firefox asks. The add-on is signed by Mozilla.
First launch on Mac
macOS asks once for each version. Updates installed with Update Now open without a warning.
1. Click Done when macOS says the app was Not Opened (not Move to Bin).2. Open System Settings → Privacy & Security, scroll to Security and click Open Anyway.3. Click Open Anyway and enter your Mac password or use Touch ID.
On macOS 13 and 14 you can also right-click the app → Open → Open.
Quick guide
How to use it
The full user guide is built into the app (Help, ⌘? on Mac, F1 on Windows) and online.
To
Do this
Download a link
Add URL (⌘N / Ctrl+N), paste one or more links, Start Download
Save a video
Point at the video → Download this video, or paste the page link into Add URL and pick a quality
Download from a website
Click the download link in your browser; the app takes over
Download at night
Scheduler → New Queue → set the time → add downloads with Download Later
Continue an expired download
Right-click → Refresh Link… and paste a fresh link
Download a numbered series
Batch → write the link once with a pattern, e.g. file[01-50].jpg
Grab every file from a page
Grabber → enter the page address → filter by type → download the ones you check
Limit speed
Settings for all downloads, or Properties for one
Use the command line
ndm https://example.com/file.zip --queue Night · Mac: Settings → Browsers & Command Line → Install ndm Command
Stop or resume everything
⇧⌘P stop all · ⇧⌘R resume all (Ctrl on Windows)
Privacy and security
Built to be trusted
Open source, so anyone can check what it does.
No account, no tracking
The app only connects to the addresses you download from, and to GitHub for updates and its video engine.
Secrets stay private
Cookies and passwords are kept in a file only your user can read on Mac, and encrypted for your user on Windows.
Sent only where they belong
Cookies and logins go only to the download's own server, never to other hosts or after a switch from https to http.
Verified updates
An update installs only if it matches the SHA-256 published with the release; on Mac the app's identity is checked too.
Reliable resume
Every part the server sends is checked, so a changed file is never mixed with old parts.
Open source, MIT
Swift and SwiftUI on Mac, C# and WPF on Windows. Built and tested in public on GitHub.
Yes. Nexonic Download Manager is free and open source under the MIT license, with no ads, no account, no trial and no tracking.
Is this an IDM alternative for Mac?
Yes. It is a native Mac app with IDM-style features: multi-connection downloads, pause and resume, categories, a scheduler, queues and browser integration. It is not affiliated with Internet Download Manager.
Which browsers work?
Chrome, Edge, Brave and Opera through the extension, and Firefox through the add-on. Open the app once, then install the extension and restart the browser.
The browser doesn't hand over downloads. What do I do?
Open the app once so it can register with your browsers, then restart the browser. If the app can't be reached, the browser keeps the download, so nothing is lost.
macOS says it can't verify the app. What do I do?
That's expected: the app is free and not sold through Apple, so macOS asks once. Follow the three steps in First launch on Mac, or install with the one-line Terminal command and there is no warning.
Can it download any video?
It saves videos from 1,000+ sites and streamed video. For videos that need you to be signed in, open the video in your browser while signed in and click Download this video, or add your login under Properties → Login. Copy-protected services are not supported.
A video site stopped working.
The video engine updates itself every day, so try again later. If it still fails, report the problem with the page link.
How do I update?
The app tells you when a new version is out and installs it with Update Now (it closes, updates and opens again). You can also use Check for Updates, or download the new version from this page and install it over the old one.
Where are my files saved?
In your Downloads folder by default, sorted into category folders (Downloads/Video, Downloads/Music…). You can choose another folder in the download window or turn categories off in Settings.
How do I report a problem?
Open an issue on GitHub with your system, the app version from About, and the link if it is public.
Download faster, starting today
Free for Mac and Windows, with the browser extension for Chrome, Edge, Brave, Opera and Firefox.
