Privacy Policy
What the Nimbus launcher, the in-game client and this website do with your information.
Effective
1. Who we are
Nimbus ("we", "us") is an independent project that makes the Nimbus launcher, the Nimbus in-game client for Minecraft: Java Edition, and this website. Nimbus is not an official Minecraft product and is not approved by or associated with Mojang or Microsoft.
This policy covers the Nimbus launcher, the Nimbus client and this website. Minecraft, your Microsoft account, Discord and the servers you play on are run by other companies under their own privacy policies.
2. The Nimbus launcher
Signing in with Microsoft
When you add a Microsoft account, the launcher shows you a short code. You enter it on Microsoft's website and approve the sign-in there, so Nimbus never sees your password. Microsoft then gives the launcher sign-in tokens. The launcher uses those tokens to talk to Xbox Live and Minecraft services. Those services confirm that you own Minecraft: Java Edition and provide your Minecraft username, your player ID (UUID), your Xbox user ID and your skin.
Offline accounts, used for testing, only store the name you type and an ID generated from it.
What the launcher stores on your computer
Everything below stays on your computer. Nimbus has no server that the launcher reports to.
| What | Where | What's in it |
|---|---|---|
| Sign-in tokens | Your operating system's keychain (macOS Keychain, Windows Credential Manager, or Secret Service on Linux), under the name nimbus-launcher | The tokens that keep you signed in. If your system has no keychain, they're saved in secrets.json, which only your user account can read. |
| Account list | accounts.json | Minecraft username, UUID, Xbox user ID, skin address, and whether the account is Microsoft or offline. |
| Settings | settings.json | Your launcher preferences, such as memory, Minecraft version and which performance mods are on. |
| Game files | versions, libraries, assets, runtime and instances folders | Minecraft, Java, mods, and your game folder with worlds, screenshots and Minecraft's own log files. |
These files live in %APPDATA%\nimbus on Windows, ~/Library/Application Support/nimbus on macOS and ~/.local/share/nimbus on Linux.
Minecraft's log files can contain your username and chat messages. They stay on your computer unless you choose to share one, for example when asking for help in our support forum.
Services the launcher connects to
To install and start the game, the launcher connects directly to these services. Like any website you visit, each one can see your IP address.
| Service | Why | What it receives |
|---|---|---|
| Microsoft, Xbox Live and Minecraft services | Signing in, checking that you own the game, getting your profile and skin | Your sign-in tokens. See the Microsoft Privacy Statement. |
| Mojang download servers | Downloading Minecraft and Java | Requests for game files |
| Fabric | Downloading the Fabric mod loader | Requests for loader files |
| Modrinth | Finding and downloading performance mods such as Sodium | Which mods and Minecraft version you need. See Modrinth's privacy policy. |
| mc-heads.net | Showing your player head next to your account name | Your Minecraft UUID, which is already public |
The launcher has no analytics, telemetry, ads or crash reporting, and doesn't send your tokens, settings or game data to Nimbus.
3. The in-game client
The Nimbus client (the mod menu, HUD and modules you use in game) saves its settings and HUD layout in config/nimbus.json in your game folder. It doesn't make any internet connections of its own.
Minecraft itself sends data to Microsoft and Mojang under the Microsoft Privacy Statement, and every server you join can see your username and what you do on it. Nimbus doesn't control either of these.
4. This website
- No cookies, analytics or trackers. We don't run analytics or ads on this site, and every font, image and script is served from this site itself.
- Hosting. The site is hosted on Cloudflare Pages. Like any web host, Cloudflare processes technical information such as your IP address, browser type and the pages you request, to deliver the site and protect it from attacks. See Cloudflare's privacy policy.
- Your username on the shop page. If you save your Minecraft username on the shop page, it's kept in your browser's local storage so you don't have to type it again. When you check out, it's sent to our payment provider with your order. Clear it by clearing this site's data in your browser.
- Downloads and links. Installers are downloaded from GitHub, and our community links go to Discord. Those sites have their own policies: GitHub, Discord.
5. Shop purchases
This section applies once the shop is open. Checkout happens on our payment provider's secure page, Stripe, and we never see your full card number.
When you buy something, we receive:
- the Minecraft username you entered
- your name and email address
- the billing details you enter at checkout, such as country and postal code
- what you bought, the price and whether payment succeeded
We use this only to unlock your cosmetics, help you with your order, handle refunds and keep the records that tax and accounting laws require. Cosmetics are linked to your Minecraft account, and other Nimbus players can see the ones you have equipped.
We keep purchase records for as long as we need them to provide your cosmetics, and for as long as tax and accounting laws require.
6. Discord community
Our community server runs on Discord under Discord's privacy policy. Messages you post can be seen by other members and by our moderators. Moderators may remove posts or members that break the server rules, and may keep a record of moderation actions. We don't sell what you post or use it for anything except running the server.
8. Children
Many Minecraft players are young, so we keep things simple. The launcher and client don't send personal information to us, and this website doesn't track anyone. We don't knowingly collect personal information from children under 13, or under the age of digital consent where you live.
If you're under 18, ask a parent or guardian before buying anything in the shop. They should make the purchase or give permission. If you believe a child has sent us personal information, contact us and we'll delete it.
9. Your choices and rights
- Delete your data from the launcher. Remove an account in the launcher to delete its saved tokens. To remove everything, uninstall Nimbus and delete the data folder listed in section 2.
- Reset the client. Delete
config/nimbus.jsonin your game folder. - Shop data. You can ask us for a copy of your purchase information, ask us to correct it, or ask us to delete it. We may need to keep some records where the law requires.
- Where you live. Depending on where you live (for example the EU, UK or California), you may have more rights, such as to object to how we use your information or to complain to your local data protection authority. Contact us to use any of them; we won't treat you differently for doing so.
For information that Microsoft, Discord or Stripe hold, use their own privacy tools or contact them directly.
10. Security
The launcher keeps your sign-in tokens in your operating system's keychain and connects to every service over encrypted HTTPS. No system is perfectly secure, so keep your computer protected, and never share your login or tokens with anyone. Our staff will never ask for them.
11. Changes to this policy
If Nimbus starts handling information in a new way, for example when new features launch, we'll update this page and the date at the top. We'll post important changes in our Discord's announcements channel.
12. Contact us
Questions or privacy requests:
- Email: loading…
- Discord: post in the support forum on our Discord server (don't post private details there; ask a moderator to message you instead).