Closed beta for Windows
Manage your self-hosted game servers in one place, create them in a few clicks and share them with friends. Whoever wants to play simply starts the server themselves, locally or in the cloud – always with the latest state and the same address.
Minecraft
Project Zomboid new
Terraria newNo credit card · Windows 10/11 · free during the test phase
In three steps
Pick a game: Minecraft (Vanilla, Paper or a Modrinth modpack), Terraria or Project Zomboid. The app downloads Java, server files and mods.
Send an invite link. Everyone connects through the same fixed address – no port forwarding, no router settings.
One click on your own PC. Afterwards the world is saved; next time someone else hosts with the latest state.
The world travels with you
After every session the app uploads the new state and versions it. On the next start the new host fetches the latest state; the address stays the same. If nobody can host, you start a cloud server when needed.
Animation: someone from the group downloads the latest version of the world from the cloud and hosts it on their own PC; the others connect through the fixed address. After the session the new state is saved in the cloud, and next time someone else hosts – with the same address and the latest state.
What the app does for you
Everything a rented server, a control panel, a backup script and port forwarding would otherwise do is in one app on your PC.
The app downloads Java, server files and mods itself – including whole Modrinth modpacks and mods from the Steam Workshop.
Whoever has time starts it with the latest state. A world lock stops two PCs from starting the same world at once.
A new, hash-checked state after every session. Older states can be restored.
Every world has a fixed address via relay. Players who only join need the game and the address.
Games
Syncing the world, switching hosts, connecting through the relay: that applies to every game on this list. Everyone in the group still needs the game itself separately.
Vanilla, Paper or a modpack from Modrinth: the app downloads the server and the mods itself.
Every setting with an explanation and its default, plus the game's own presets.
An address with port to share and a world map drawn from your world file.
Minecraft Java EditionThe game World Sync Play started with and the one that has been tested most.
Project ZomboidA dedicated server for Build 42, with an explanation for every setting.
TerrariaYour world file stays up to date, no matter who starts the server.
Project Zomboid and Terraria are new and are being tried out with players right now, so expect rough edges there. All game names and trademarks belong to their respective owners; World Sync Play is not affiliated with them and is not endorsed by them. The game images are our own illustrations; the screenshots show the real app with sample data.
The difference
How World Sync Play differs from a rented server and from free online hosts – you play on your own PCs, without renting a server permanently.
| Question | World Sync Play | Rented server | Free online host |
|---|---|---|---|
| Where does the server run? | On the PC of someone in your group, in the cloud when needed | In the provider's data centre | In the provider's data centre |
| What does it cost? | Hosting locally costs nothing; cloud only from credit | Monthly rent, even when nobody plays | Nothing, but depending on the provider ads, queues or limits |
| How much power? | As much as the host's PC delivers | Depending on the plan you book | Limited by the provider |
| Who starts the server? | Any member with permission, always with the latest state | It runs all the time | Whoever has access, through the website |
| Where is your world? | With you and saved in the cloud, with older states | On the provider's server | On the provider's server |
A general comparison of the kinds of hosting; individual providers differ.
Quick answers
A rented server runs around the clock, even when nobody's playing. World Sync Play syncs your world automatically instead – it's only hosted while you actually play: locally, through Relay or optionally in the cloud.
No. Every permitted member can start the world locally. If nobody can or wants to host, a cloud server steps in when needed – here's how that looks.
No. If a direct connection doesn't work, World Sync Play forwards it automatically through Relay – no port forwarding or router settings.
Nothing during the beta, and paying isn't possible at all yet. After the test phase your account switches to the free plan Free automatically; no subscription starts on its own, and you don't have to cancel anything. Hosting on your own PC needs no credit; a cloud server uses cloud credit by runtime and size. Plans and hourly rates are on the pricing page.
Not for everyone yet: we're testing in a closed beta. Access is by invitation with an access code: Request beta access or, if you already have a code or an invite, create your account with it. During the test phase you can use the extended early-access limits for free. Plus and Pro only become bookable after the test phase ends; we will tell you about the transition in good time.
The installer is signed with our own certificate ("World Sync Play (Self-Signed Alpha)"). Windows doesn't know this certificate yet, so SmartScreen shows "Windows protected your PC" on the first start. If you downloaded the installer from this site, click "More info" and then "Run anyway". A certificate Windows trusts on its own will follow once the company has been founded.
Closed early access
World Sync Play is currently in a closed test phase. Access is by invitation with an access code for now. The test phase is free; Plus and Pro only become bookable after the test phase ends.
Request beta access with the form. We'll send you access codes by email.
Create your account with it. An invite link from friends fills in the code for you.
I have a codeAlready approved? You get the Windows installer in your account after logging in, or here:
No credit card · Windows 10/11 · Use requires an approved account · Signed with our own certificate; Windows warns on the first start (see FAQ).Account created but not approved yet? Redeem access code
Tell us how many of you want to play. We will email you as soon as we have enough access codes for you.
These games could come next. Your wishes help decide which comes first: mention it in your access request.
Factorio in preparation
Minecraft Bedrock Edition
Valheim
Satisfactory
Palworld
Enshrouded
7 Days to Die
V Rising
Don't Starve Together
Core Keeper
Sons of the Forest
ARK: Survival Ascended