What Is Arnis and How Do You Generate Real-World Minecraft Maps?

Arnis is a free, open-source desktop application that converts real-world geographical data into playable Minecraft Java and Bedrock Edition worlds. You pick any location on Earth on an interactive map, draw a rectangle around the area you want, and generate it into a Minecraft world that recreates streets, buildings, landmarks, and terrain. If you don't want to install anything — or you're on a phone or tablet — MapSmith, the browser-based companion service, generates worlds online instead. The desktop app is the right choice if you want the full toolset and don't mind a download; MapSmith is the right choice for mobile players or a one-off world without setup.

What Arnis actually does

Arnis takes real-world map data and turns it into Minecraft terrain and structures. According to the official site, it recreates "streets, buildings, landmarks, and terrain from any location on Earth," and outputs worlds for both Minecraft Java and Bedrock Edition. The site's gallery shows generated results for locations including New York, the Grand Canyon, Heidelberg, London, Paris, and the Taj Mahal — all produced "within minutes."

Two things follow from that description:

• It's a world generator, not a mod. You get a Minecraft world as output, which you then open in your normal Minecraft installation.
• It's location-driven. The input that matters most is where you select on the map, plus whatever customization settings the app exposes.

Generating a world in the desktop app

The official workflow is three steps:

1. Select your area — Choose any location on Earth using the interactive map and the rectangle selection tool.
2. Choose your world — Generate a new world, or select an existing one.
3. Generate and explore — Click "Start Generation" and watch the selected area get built into Minecraft.

What to expect at each step: after drawing your rectangle, the app knows the bounding area to convert; choosing a world determines whether you're creating something fresh or writing into an existing save; and generation is the compute-heavy step where the real-world data becomes blocks. The site describes generation as happening "within minutes" for the showcased locations.

Verification: the practical check is to open the generated world in Minecraft and confirm the area matches the location you selected — recognizable street layouts, building footprints, and terrain shape are the signals that the conversion worked.

Generating online with MapSmith

If you'd rather not download anything, MapSmith generates Minecraft worlds directly in a browser on any device. The site lists four advantages:

This is the path to take if you're on mobile, if you're on a device where you can't install desktop software, or if you just want to test the tool before committing to a download.

Practical limits: size, time, and platforms

• Area size: The FAQ states there is "no hard limit," but practically the size is constrained — the page text cuts off at that point, so treat very large selections as something to test rather than assume. MapSmith advertises up to 500 km².
• Generation time: Showcased locations generate "within minutes." Larger or denser areas will take longer; MapSmith claims faster generation than a typical home computer because it runs on optimized servers.
• Platforms: The desktop app is available for Windows, Linux, and macOS. Output targets both Minecraft Java and Bedrock Edition.
• Cost: Arnis itself is completely free and open source under the Apache 2.0 License. The site notes there is a paid online generation service for generating worlds on mobile devices — so the desktop app and the online service are not the same thing on price. Donations are welcomed to support development.

Downloading safely

All downloads are hosted on the official GitHub repository, and the site explicitly warns: "For your safety, always ensure you are downloading from the official GitHub page." Since the project is open source, the GitHub release page is also where you can inspect the code and track versions. Avoid mirrors or third-party download sites.

Which option should you pick?

• Choose the desktop app if you're on Windows, Linux, or macOS, want the free open-source tool, and are fine installing software.
• Choose MapSmith if you're on mobile, want no installation, need a large area (up to 500 km²), or want faster generation on server hardware — and you accept that online generation is a paid service.
• Choose either if you just want to see your hometown, city, or a landmark rebuilt in Minecraft; both start from the same idea of selecting a real-world area and converting it into a playable world.