Free Download Manager has been the “actually free” alternative to IDM for years. It hands off from Chrome and Firefox, downloads in multiple segments, torrents, plays media in a built-in preview pane, and does not charge a cent. It also had a real supply-chain compromise in 2015 and again in 2023 on a Linux repository mirror, and the current build still bundles a browser extension that some users prefer not to install. People searching for Free Download Manager alternatives usually want one of three things: something without any bundled installer story, a modern UI that does not look like a Vista utility, or a cross-platform CLI so a home server can queue downloads. We compared seven that cover all three.
Quick comparison
| App | Best for | License | Platforms | Standout |
|---|---|---|---|---|
| JDownloader 2 | One-click file hosters | Free, open-source | Windows, macOS, Linux | Rapidshare-era filehoster automation |
| Motrix | Modern all-purpose | Free, open-source | Windows, macOS, Linux | Clean Electron UI, HTTP plus torrent |
| Xtreme Download Manager | Open-source IDM clone | Free, open-source | Windows, macOS, Linux | Multi-segment, browser hand-off |
| Persepolis | aria2 with a GUI | Free, open-source | Windows, macOS, Linux | Lightweight, scriptable backend |
| DownThemAll! | Browser-native | Free, open-source | Any browser | No separate app; works from Firefox |
| Ninja Download Manager | Windows polish | Freemium | Windows | Native UI, one-time purchase |
| aria2 | Command line power | Free, open-source | Windows, macOS, Linux | Every protocol, scripts and headless servers |
Why people leave Free Download Manager
Supply-chain history matters. FDM’s Linux repository was compromised in 2023 and served a backdoored .deb for months. FDM patched it and moved on, but a lot of security-minded users decided to move on to something without that history.
The bundled browser extension. FDM’s Windows installer suggests a Chrome extension for download hand-off. It works well; some users just prefer to install fewer browser extensions from third-party publishers.
UI is stuck. The FDM interface has been updated visually, but the underlying dialogs still feel like a 2015 Windows utility. Motrix, in particular, looks like a modern app in a way FDM does not.
Ad and promotional surface. FDM’s news pane recommends other tools inside the app. It is not aggressive, but it is more than most open-source competitors show.
No CLI. FDM is a GUI-first app. For a home server or an automated download queue, most people end up on aria2 or a JDownloader headless setup instead.
The alternatives
JDownloader 2: one-click file hosters
JDownloader is the app people install specifically for file-hoster links: Mediafire, MegaUp, Rapidgator, and the long tail of “click here to unlock in 30 seconds” sites. It solves captchas, chains links, respects premium account cookies, and has plugin support for hundreds of hosters. It is Java, so the install is heavier, but for its niche nothing else is close.
Where it falls short: Java runtime bundled. UI is dense. The linkgrabber and download tabs take a couple of hours to learn well.
Pricing: Free and open-source.
vs FDM: Different focus. Wins on file-hoster automation. Loses on simple HTTP downloads and browser hand-off polish.
Migrating from FDM: Install, log into hoster accounts through the plugin panel, paste links.
Download: jdownloader.org
Bottom line: The right pick if you use file hosters at all.
Motrix: modern all-purpose
Motrix is the download manager that looks like a modern app. Built on Electron with an aria2 backend, it handles HTTP, HTTPS, FTP, BitTorrent, and Magnet links, and it does all of it behind a clean, sane UI. The install is a normal signed installer, no bundled extras, no promotional pane.
Where it falls short: Electron footprint means around 200 MB of RAM at rest. Development pace has slowed since 2023. Browser hand-off is via a manual extension, not automatic like FDM.
Pricing: Free and open-source.
vs FDM: Cleaner install, prettier UI, roughly the same feature set. Slower browser hand-off.
Migrating from FDM: Copy download URLs from FDM, paste into Motrix, or reconfigure browser extensions to point at Motrix.
Download: motrix.app
Bottom line: The right pick for people who want the FDM feature set in a modern UI.
Xtreme Download Manager: open-source IDM clone
XDM is the closest open-source equivalent to IDM in shape and feature set. Multi-segment downloads, browser hand-off through a native messaging extension, resume support on almost every host, and a scheduler for off-peak downloads. It runs the same on Windows, macOS, and Linux.
Where it falls short: Java-based, so a JRE is bundled and startup is not instant. UI is functional but not polished. The browser extension needs a manual install and native messaging setup.
Pricing: Free and open-source.
vs FDM: Similar feel. Bigger install because of Java. Cleaner around the edges.
Migrating from FDM: Install XDM, install the browser extension, downloads route through it.
Download: xtremedownloadmanager.com
Bottom line: The right pick for former IDM users who want the same shape without paying.
Persepolis: aria2 with a GUI
Persepolis is a Python and Qt front-end for aria2. It exposes aria2’s speed and protocol support behind a clean download queue, works everywhere aria2 does, and has a lightweight footprint. Cross-platform builds are signed on Windows and macOS.
Where it falls short: Requires aria2 installed alongside on macOS and Linux. No first-class browser extension; hand-off is via a manual “add link” flow. Development is smaller-scale than JDownloader or Motrix.
Pricing: Free and open-source.
vs FDM: Same broad category. Smaller app. Less bundled polish.
Migrating from FDM: Install Persepolis and aria2, paste URLs, start queue.
Download: persepolisdm.github.io
Bottom line: The right pick when you want aria2’s power without writing a config file.
DownThemAll!: browser-native
DownThemAll! is a Firefox extension that turns the browser itself into a segmented download manager. Right-click a page, tell it what to grab, and it saves everything in parallel. No separate app to install, no external process, no hand-off flow.
Where it falls short: Firefox-only in its current form (a Manifest V3 Chrome build is still in progress). No queue across browser restarts. No torrent support.
Pricing: Free and open-source.
vs FDM: Different tool. Wins on convenience for browser downloads. Loses everywhere else.
Migrating from FDM: Install the extension in Firefox, drop the separate app.
Download: downthemall.net
Bottom line: The right pick if all your downloads start from a browser tab.
Ninja Download Manager: Windows polish
NDM is the paid Windows download manager that spends time on the small things. A modern Fluent-style UI, a queue that survives reboots, per-site bandwidth caps, and a proper browser hand-off through Chrome and Edge extensions. The free tier is fully functional with a limited download slot count; the paid unlock is a one-time buy.
Where it falls short: Windows only. Development pace is slow. Free tier’s slot limits kick in quickly on parallel large downloads.
Pricing: Free with limits. Pro unlock around 20 USD one-time.
vs FDM: Prettier UI. Less feature-loaded. Windows-only.
Migrating from FDM: Install NDM, install its browser extension, downloads route through it.
Download: ninjadownloadmanager.com
Bottom line: The right pick for a Windows user who wants FDM’s UX but the polish of a paid app.
aria2: command line power
aria2 is the download engine underneath Motrix and Persepolis, exposed directly. It handles HTTP, HTTPS, FTP, SFTP, BitTorrent, and Metalink from a command line or a JSON-RPC API. Home servers, NAS boxes, and remote sessions all lean on it because it runs headless.
Where it falls short: No GUI. If a GUI is what you want, use Motrix or Persepolis. Configuration lives in a text file that intimidates newcomers.
Pricing: Free and open-source.
vs FDM: Different shape. Wins for automation and headless use. Loses for anyone who wants to click a button.
Migrating from FDM: Install aria2, write a small config, drive it from scripts or a WebUI like AriaNg.
Download: aria2.github.io
Bottom line: The right pick when the download manager needs to live on a home server, not a desktop.
How to choose
Pick Motrix if you want FDM’s feature set with a modern UI and no bundled extras. It is the default swap for most people.
Pick JDownloader 2 if the reason you had FDM in the first place was for file-hoster automation. Nothing else is close in that specific niche.
Pick Xtreme Download Manager if you specifically want the IDM-like multi-segment speed feel in an open-source app.
Pick Persepolis if you already use aria2 or want aria2’s protocol support without hand-writing config files.
Pick DownThemAll! if 90% of what you download starts as a link in Firefox.
Pick aria2 for anything headless, automated, or running on a home server or NAS.
Stay on Free Download Manager if the current build works for you, you have already verified the installer, and the browser hand-off flow is muscle memory. It is still a competent app; it just has more alternatives than it used to.
FAQ
Is Free Download Manager actually free?
Yes. FDM is free with no paid tier. It is not open-source, and it shows an in-app news pane, but you never pay to use it.
What happened with the Free Download Manager Linux backdoor?
In 2023, a compromised repository served a backdoored .deb of FDM to some Linux users for a period. FDM published a post-mortem, patched the distribution, and rotated their signing keys. The Windows and macOS builds were not affected. It is a real event that some users weigh when picking a download manager in 2026.
Which of these is the fastest?
For a single large file over HTTP, aria2 and XDM are typically the fastest because they use aggressive multi-segment downloading. For file-hoster links, JDownloader wins because it can queue many links from the same host serially, which is what those hosts require.
Do any of these support browser hand-off like FDM?
XDM, Motrix (with the manual extension), and Ninja Download Manager all install a browser extension that captures download links from Chrome, Firefox, and Edge. DownThemAll! lives entirely inside Firefox.
Is there a modern open-source alternative to IDM?
XDM comes closest in feature set. Motrix is close in feel with a much more modern UI. Both are free and open-source.
Which one should I use on a NAS or home server?
aria2 directly, or JDownloader 2 running headless. Both expose RPC or WebUI interfaces so a phone or laptop can queue downloads from anywhere.
