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Your MSFS add-on library, under control.

A free, modern add-on manager for Microsoft Flight Simulator 2024. Symlink-based activation, smart grouping, a full GSX Profiles page, and a Route Finder that knows what your hangar can fly.

Download for free
How it works

From folder chaos to a calm, flight-ready library.

Your folders, your rules

Your add-ons stay where you put them. Point Preflightly at one or more source folders (your existing library, your Orbx folder, anything else you own) and it indexes them in one place.

Toggle in one click

Activate only the aircraft, sceneries, and liveries you need for tonight's flight. Groups are suggested automatically from your library on first run.

Files untouched

Preflightly never moves or copies your add-ons. The symlinks it creates in Community/ are the only side effect, and Reset removes them in one click.

Route Finder

Find flights your simulator is ready to fly.

70,000 commercial routes matched against your hangar. Preflightly shows what's flyable now, what needs one click, and activates the right add-ons for you.

Suggests routes based on the aircraft, liveries, and sceneries you actually own.
Activates the right add-ons automatically when you pick a route.
SimBrief integration: export your flight plan in one click.
Surprise Me: a random flyable route, Solari split-flap reveal.
Zulu times by default (with a local-time toggle) and a live countdown to departure on every route.
A day / night / dawn / dusk tag computed from the real sun position along the flight.
Tracks routes you've already flown. Dataset updated remotely.
CPH Copenhagen, DK 20:55Z
~1h 35m
HEL Helsinki, FI 22:30Z
SK
Scandinavian Airlines SK1720 · Airbus A320neo
Now
Addons checklist
Airbus A320neo
Scandinavian Airlines livery
CPH scenery
HEL scenery
GSX profiles
New — GSX Profiles

Every GSX profile, matched to its airport.

Preflightly indexes every GSX Pro profile in your GSX folder and gives them their own page, linked to the scenery they belong to. See at a glance what's covered, what's an orphan, and which airports still need one.

A zoomable map of every stand: jetway, walk-out, bus and cargo, sized by wingspan, with VDGS halos and deicing zones.
An operators card showing which ground handlers work each airport, main operator highlighted.
Clean GSX finds duplicate and orphan profiles and shows exactly what it wants to remove before you confirm.
Profiles bundled inside a scenery get a one-click install into your GSX folder, and a Search ↗ link helps you find missing ones on flightsim.to.
Smart library

Your add-ons, understood.

Quick Import

Drop a folder or a ZIP, even one bundling several add-ons at once. Preflightly finds each manifest root, places any embedded GSX profile in the right folder, asks before replacing, and offers group assignment. The whole manual flow, gone.

Toggle all

One button activates or deactivates everything currently visible, so it respects your search and filters. Activations run in parallel: several hundred add-ons take seconds, with a single confirmation above twenty.

Intelligent grouping

Groups are suggested automatically from your first scan: sceneries by ICAO region, aircraft by category. Activate an entire set for a flight, deactivate when done.

Deep add-on intelligence

Reads manifests to classify aircraft, liveries, sceneries, GSX profiles, and dependencies. Validates livery parents, flags conflicts with Official airports, and handles publisher-specific edge cases.

Conflict detection

Before activating a scenery, Preflightly checks for conflicts with other active add-ons or Official airports. A pre-confirmation modal lets you switch cleanly, no silent overwrites, no surprises mid-flight.

Tidy on Re-sync

Re-sync keeps things honest: it recognizes iniBuilds Hub and simMarket libraries, cleans up duplicate entries, and points out any add-ons sitting loose in Community/ so nothing slips through the cracks.

Autorun

Your sim stack, launched in one click.

SimBrief, Little Navmap, VATSIM, GSX: Preflightly detects your installed sim tools from your Start Menu and launches them in sequence before you fly. No more opening apps one by one.

SimBrief
Little Navmap
VATSIM
GSX
vPilot
BeyondATC
Navigraph
ActiveSky
+ auto-detected

Get Preflightly.

Free to download and use. No subscription, no trial.

Download free

Windows 10 / 11 · ~42 MB · Beta

Coming from MSFSAddonsLinker or another add-on manager? Preflightly is a replacement, not a companion. Don't run both at the same time: their symlinks will fight for the same entries in Community/ and you'll end up with broken activations. Pick one, uninstall the other.

Do I still need MSFSAddonsLinker (or another add-on manager)?
No, and you shouldn't run both at the same time. Preflightly is itself a symlink-based add-on manager meant to replace tools like MSFSAddonsLinker. Running both creates conflicting symlinks in Community/ for the same add-ons, which usually breaks activations until you pick one tool and uninstall the other. Preflightly can read your existing AL library directly as a source folder, so there's no need to migrate files before switching.
How does it actually work under the hood?
Your add-ons stay where you put them. You point Preflightly at one or more source folders on disk (a single library, or several: your existing Addon Linker library, your Orbx folder, your Aerosoft One layout, whatever you already have). When you activate an add-on, Preflightly creates a symbolic link from that folder into your Community/ folder. MSFS sees it as if the package is there, but no file is ever copied or moved. Deactivating removes the link instantly.

At setup, Preflightly walks each source folder recursively looking for any folder with a manifest.json, scans Community/ and Community2024/ (for migrated installs), and reads your Official content. It classifies each package (aircraft, livery, scenery, GSX profile, dependency library) and builds a structured inventory. Orbx Central, Aerosoft One, iniBuilds Manager and FlyByWire Installer are auto-detected and indexed too.
Does it manage my GSX Pro profiles?
Yes. Preflightly indexes every GSX Pro profile in your GSX folder and gives them a dedicated page, each one matched to the scenery it belongs to. You get a zoomable stand map (jetway, walk-out, bus, cargo, with VDGS halos and deicing zones), an operators card, and a Clean GSX tool that finds duplicate and orphan profiles and shows exactly what it wants to remove before you confirm. Profiles bundled inside a scenery can be installed into your GSX folder in one click, and the Sceneries page links straight to a flightsim.to search for any airport that's missing one.
Does it touch or delete my files?
Preflightly doesn't move or copy your add-ons. Activation creates a symlink in Community/, deactivation removes it. The only action that touches your files is Delete from disk in the row menu, which permanently deletes the folder from your drive after an explicit confirmation. Everything else (activation, deactivation, Reset) leaves your source folders exactly as they are.
Does it work offline?
Core library management is fully local, no connection needed. Route Finder requires one connection to cache the routes dataset, then works offline against the cached copy.
Does it support MSFS 2020?
Preflightly targets MSFS 2024. If your install was migrated from 2020, both Community/ and Community2024/ are scanned automatically. A standalone MSFS 2020 install is not supported.
Can I keep using Orbx Central, Aerosoft One, iniBuilds Manager or FlyByWire Installer?
Yes. Preflightly auto-detects these tools at setup, indexes their content so it shows up in your tables and in Route Finder, and leaves their symlinks alone. Those installers keep doing what they do, Preflightly just gives you a single dashboard across everything.
Can I point Preflightly at my existing Addon Linker library?
Yes. During setup you declare your AL library as a source folder and Preflightly indexes it as-is. You can add as many source folders as you want (your AL library, your Orbx folder, a region-by-region custom setup, whatever you already have). Uninstall AL afterwards so the symlinks don't fight each other in Community/.
What if an add-on sits directly in Community/ (Fenix Installer, hand-installed packages)?
Preflightly only tracks what lives inside one of your declared source folders. When Re-sync finds add-ons sitting directly in Community/, it pops a modal listing them and offers a shortcut to open Community/ in Explorer so you can drag them into a source folder yourself. After that, Re-sync once more and they show up as regular managed add-ons.
Will Preflightly touch packages I bought on the Marketplace or that ship with MSFS?
No. Marketplace and Asobo-bundled content lives in Official/, not Community/. Preflightly reads that content (so Route Finder can count Asobo airports as coverage and stock liveries as available) but never writes to it. Enabling or disabling Marketplace packages still happens in the MSFS Content Manager.