Chunkmap

What Chunkmap is

Chunkmap generates top-down 2D maps of Minecraft worlds from region (.mca) files. Its web viewer lets users upload region files to view their own worlds, while its CLI can render individual files or combine rendered images into one map. It covers the Overworld, Nether and End, with rendering modes for textures, heightmap, biomes, temperature, downfall and inhabited areas.

The CLI is open source under the MIT license on GitHub, and the project provides a Discord community link. Chunkmap is free and available for web and Windows, with offline viewing supported. The website labels it beta and under development, and cautions that it may not work as expected. The beta has only been tested with Minecraft 1.21.x worlds; modded worlds and chunks created before 1.18 are unsupported. The project README also notes that Nether generation is slower than generation for the Overworld and End.

Who it suits

Chunkmap suits Minecraft players who want a map from region files, including offline viewing or CLI rendering. Its compatibility limits make it a fit for supported, non-modded worlds with chunks generated from 1.18 onward.

Limits

The Open-source beta plan costs nothing. The beta has been tested only with Minecraft 1.21.x worlds; modded worlds and chunks generated before 1.18 are unsupported.

Getting started

1. Visit the Chunkmap website.
2. Upload region (.mca) files in the web viewer to view a world.
3. For CLI rendering, use the open-source CLI available on GitHub.
4. Choose a rendering method and render individual region files or merge images into a map.

Verdict

Chunkmap provides several ways to render region files and inspect Minecraft dimensions. Check its beta and world-version limits before relying on it for a particular save.