Only downloads what's missing or outdated.
Assetto Corsa Content Sync
AC Sync for Assetto Corsa: automatically sync mods, tracks, skins and apps.
AC Sync gives drivers a simple Windows Client for Assetto Corsa content. Sync Server gives admins the backend for league, event and community mods.
For drivers
Install, add league server, select series, synchronize.
For Admins
Store content once and let the server index it.
For Communities
Less stress before race day.
AC Sync
Game changer for drivers
AC Sync compares the selected Assetto Corsa destination folder with the server and downloads only missing or modified files. Downloaded files will not be executed, files in the destination folder will not be deleted.
Typical driver sequence
Open AC Sync -> Select Server -> Select Series -> Synchronize.
Does not delete anything in your game folder or launch downloaded files.
Checks each file before replacing so that everything arrives complete and correct.
Can automatically keep selected series up to date in the background.
Starts with Windows on request and continues to run inconspicuously in the background.
Usually finds your Assetto Corsa folder automatically.
You can save multiple servers and switch later with one click.
There are 5 languages as language packs, and more language packs can be added.
Why AC Sync
Search less. Drive more.
Everyone knows this moment just before the race: a skin appears in the Discord, the track has been updated, someone has a different car version and suddenly the search for the right file begins. AC Sync does exactly this work for you.
You choose your community, your series, and click sync. AC Sync checks your Assetto Corsa folder and only reloads what is missing or out of date. Your existing files won't simply be deleted and downloaded files won't start.
Without AC Sync
Find the zip file, extract it, pick the right folder and hope.
Lots of manual work before each race
Searching for downloads, unpacking them and sorting them manually takes time and nerves.
Versions drift apart quickly
Different mod states often lead to error messages or unclear support in the team chat.
With AC Sync
Select server, select series, synchronize, drive.
Updates land only where they are supposed to
AC Sync checks files, blocks dangerous file types and replaces content only after a successful download.
On request, it runs on the side
Series can be kept up to date automatically without you having to think about it before each event.
Your community isn't using it yet?
Let your admin know.
If your league or regular racing group is still working with manual downloads, a quick note to the community admin is worthwhile. The Sync Server provides the content centrally, AC Sync picks it up cleanly from the drivers. This reduces questions before race night, avoids incorrect versions and gets new drivers ready faster.
See benefits for adminsInterface
AC Sync
Sync Server
Backend for server admins
Sync Server runs in the background on the server. It manages the content of your series, makes it available for AC Sync to download and can operate several areas cleanly separately.
01
Series folders
Each series has its own folder with all the files needed.
02
Updates itself
The server automatically detects changes and keeps the file list up to date.
03
Multiple instances possible
A server can run multiple instances at the same time, for example for live, test or league environments.
04
Safely accessible
Can be operated securely over HTTPS, for example with nginx and certificate.
Why Sync Server
A content depot for all drivers.
For admins, the biggest advantage is simple: content is stored cleanly once on the server and all drivers pick it up from there. You no longer have to maintain multiple download links, old archives and inquiries in the chat.
As soon as you change files in a series, the Sync Server creates new file lists with size, change time and SHA 256 checksum. AC Sync reliably detects what is missing or different on each driver machine.
Without Sync Server
Pack archives, distribute links, clarify queries.
High effort with every change
Building new links, repackaging files and communicating to everyone costs extra time every time.
Unclear statuses in the driver's field
Without a central source, different versions quickly end up with different drivers.
With Sync Server
Store content, have servers indexed, sync drivers.
Multiple communities possible
A server can serve different instances by hostname, such as league, test server, or event.
Admins keep control
Write accesses are protected, upload sizes can be limited and individual series can require a password.
For Leagues and Events
Less stress before the start.
Sync Server turns many manual individual steps into a repeatable process. Drivers get the same content base, admins can prepare changes centrally, and new participants get up to speed faster.
Open Sync Server WikiWorkflow
How AC sync and the sync server work together
AC Sync is the client on the driver's computer. The sync server is the central content source of the community. Both together ensure that everyone uses the same cars, tracks, skins and apps, without each driver having to collect files themselves.
1
Admin Adds Content
Cars, tracks, skins or apps are placed in the server series folder.
2
Sync Server publishes file lists
The backend provides series and file checksums for AC Sync.
3
Driver Syncs
AC Sync only downloads what is missing or different.
4
Grid Ready
All start with the expected content version.
The admin maintains the content once centrally.
There is a separate folder on the sync server for each series. There are, for example, cars, tracks, skins or apps. If anything changes, the admin doesn't need to send each driver a new guide. It updates the content in one place.
The server creates a clean file list.
The sync server looks at the files and remembers file size, change time and checksum. You can think of this as a packing list: AC Sync will later see exactly which files belong to the series and which version is expected.
AC Sync compares before anything is downloaded.
The driver selects the community server and the desired series. AC Sync then checks its own Assetto Corsa folder. Files that already exist correctly will be skipped. Only missing or outdated files are downloaded.
In the end, all that matters is that everyone is ready to go.
Fewer demands in the chat, fewer incorrect versions and less stress just before training. New drivers get into the grid faster, and regular drivers don't have to track every update manually.
Simply put:
The admin prepares the content, Sync Server tells AC Sync what is current, and AC Sync brings the driver folder to exactly that state.
Security and Trust
What AC Sync does and what it does not do.
AC Sync is a Windows Client for Assetto Corsa. It compares local files with the file list from the selected community server and downloads only missing or outdated content.
Downloaded files are not executed. Existing files in the Assetto Corsa folder are not deleted wholesale. Sync Server provides checksums and file lists so the client can verify downloads before replacing content.
Built for drivers, Assetto Corsa leagues and sim racing communities.
Provided for free as freeware, with license and download notes included.
Server admins keep control over instances, series and content structure.
FAQ
Common questions about AC Sync.
Who is AC Sync for?
For Assetto Corsa drivers, leagues, events and community servers that want to keep mods, tracks, skins or apps up to date from one place.
What can AC Sync synchronize?
AC Sync can synchronize files from series folders, for example cars, tracks, skins, apps and other community content.
Do drivers need to run Sync Server?
No. Drivers use the Windows Client. Sync Server is the backend for admins who provide content for their community.
Is AC Sync free?
Yes. AC Sync and Sync Server are provided as freeware. Usage and license notes are available in the legal notice and in the download package.
Download
AC Sync for drivers
Download the current AC Sync Setup. For drivers, autostart and autosync make sense once servers and series are set up.
Sync Server Pakete
Server binaries for admins
Prepared packages include the binary and a start config.yml for Windows Server, Linux AMD64 and Linux ARM64.