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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 Windows Windows 10 / 11 · ~42 MB · Beta

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 your add-ons out of the folders you keep them in. Activating one creates a symlink in Community/, deactivating removes it, and Reset clears them all in one click.

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.

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 takes you straight to flightsim.to for the ones you are missing.

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.

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 for Windows

Windows 10 / 11 · ~42 MB · Beta

What Preflightly does to your files

Your add-ons stay in the folders you already keep them in. Preflightly never moves them.
Activating one creates a symbolic link inside your Community/ folder, and deactivating removes it. Your source folders are never touched either way.
Changed your mind? Reset removes every link Preflightly made and leaves your source folders exactly as they were.

2,900 downloads since early access opened. Made by headwind, a community developer rather than a company. Preflightly on flightsim.to

Already running MSFSAddonsLinker? Running both puts two sets of symlinks on the same entries in your Community/ folder, which usually breaks activations. Add your AddonsLinker library as a Preflightly source folder (nothing moves), then uninstall AddonsLinker. Orbx Central, Aerosoft One, iniBuilds Manager, FlyByWire Installer and Contrail are a different case: Preflightly leaves their links alone.

Questions, answered.

What Preflightly does to your files, what it replaces, and what it leaves alone.

Do I still need MSFSAddonsLinker (or another symlink-based 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 keep one and uninstall the other. Preflightly can read your existing MSFSAddonsLinker library directly as a source folder, so there's no need to migrate files before switching. Installers like Orbx Central, Aerosoft One, iniBuilds Manager and FlyByWire Installer are a different case: Preflightly leaves their links alone.
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 MSFSAddonsLinker 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 never moves your add-ons out of the folders you keep them in. Activation creates a symlink in Community/, deactivation removes it, and Reset clears every link it made, none of which changes anything inside your source folders. Four things do write to disk, and this is all of them: Delete from disk in the row menu permanently deletes a folder from your drive after an explicit confirmation, importing copies the new add-on into the source folder you choose, installing a scenery's bundled GSX profile copies it into your GSX folder, and Clean GSX removes duplicate or orphan GSX profiles after showing you exactly what it wants to remove (duplicates are also tidied during Setup and Re-sync).
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 MSFSAddonsLinker library?
Yes. During setup you declare your MSFSAddonsLinker library as a source folder and Preflightly indexes it as-is. You can add as many source folders as you want (that library, your Orbx folder, a region-by-region custom setup, whatever you already have). Uninstall AddonsLinker 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.