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MinedMap

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What MinedMap is

MinedMap renders maps from Minecraft save games and provides a browser viewer for displaying and navigating them. It supports unmodified Minecraft Java Edition versions 1.8 through 26.1, without requiring a mod. The renderer updates tiles only in regions that have changed, and offers parallel map generation through the `-j N` option. The project says a 3 GB save can be rendered in under five minutes using one thread; typical single-threaded use is under 100 MB of RAM, though multiple threads may increase memory use.

The 2D viewer has an illumination layer for night viewing and can display sign markers with clickable popups. Sign-layer generation is off by default, with options to enable it and filter markers. Tiles use lossless compression, with PNG as the default and WebP as an option that typically reduces file sizes by 20–25%. The viewer is based on Leaflet and can be hosted alongside generated map data, but it needs an HTTP server rather than a direct `file://` opening. MinedMap is free and open source under the MIT license. Binary builds are available for Linux and Windows; source installation uses Cargo with Rust 1.72.0 or newer.

Who it suits

MinedMap suits Minecraft Java Edition players who want a browser-based 2D view of their saved worlds, including night illumination and sign markers. It also fits users who want to generate or update maps locally on Linux or Windows, or install the renderer from source.

What it does well

Works with unmodified Java Edition from versions 1.8 through 26.1.
Re-renders tiles only for regions that have changed.
Supports parallel map generation with the `-j N` option.
Offers night illumination and clickable sign popups.
Free, open source, and MIT licensed.

What to know first

The viewer must be served over HTTP, not opened from a file URI.
Sign-layer generation is disabled by default.
Multiple rendering threads may increase memory use.

Limits

The viewer cannot load map information when opened directly from a `file://` URI, so it requires an HTTP web server. Sign-layer generation is off by default.

Getting started

Download the viewer archive and a renderer binary from the release page, or install the generator from source with Cargo and Rust 1.72.0 or newer.
Use the renderer with a Minecraft save from an unmodified Java Edition version 1.8 through 26.1.
Optionally enable and filter sign-layer generation, or select WebP tiles instead of the default PNG.
Host the viewer files and generated map data on an HTTP web server.
Open the viewer in a browser to display and navigate the map.

Verdict

Choose MinedMap if you want a free, open-source way to render Minecraft Java Edition saves and browse them in a browser. Its incremental updates, night layer, and sign markers are useful map options; plan to serve the viewer over HTTP.

Questions

Is MinedMap free?

Yes. It is free and open source under the MIT license.

Which Minecraft versions does it support?

It works with unmodified Minecraft Java Edition versions 1.8 through 26.1, without a mod installation.

Which platforms have binaries?

The release page lists renderer binaries for 64-bit and 32-bit Windows and 64-bit Linux, plus a viewer archive for all platforms.

Can I view a map offline?

Offline viewing is supported, but the viewer must be served over HTTP and cannot load map information from a `file://` URI.

Can it show signs and night lighting?

Yes. It has an illumination layer and can show sign markers with clickable popups. Sign-layer generation is disabled by default and can be enabled and filtered with options.

What image formats can it use for tiles?

PNG is the default, and WebP is available as an option. The project says WebP typically reduces file sizes by 20–25%.

Facts from MinedMap's own pages

Containers: A release note says Docker images are available through GitHub Container Registry for the tile renderer and for a viewer with a web server. · github.com, 8 Oct 2026
Downloads: The latest release page lists a viewer archive for all platforms and renderer binaries for 64-bit and 32-bit Windows and 64-bit Linux. · github.com, 8 Oct 2026
Hosting requirement: The viewer requires an HTTP web server and cannot load generated map information when opened directly from a file URI. · github.com, 8 Oct 2026
Image formats: Tiles use lossless compression and are PNG by default, with WebP available as an option that the project says typically reduces file size by 20–25%. · github.com, 8 Oct 2026
Incremental updates: It recreates tiles only for regions that have changed, and the README says repeat runs rarely take more than a second or two. · github.com, 8 Oct 2026
Installation: Binary builds are offered for Linux and Windows, and the generator can also be installed from source using Cargo with Rust 1.72.0 or newer. · github.com, 8 Oct 2026
License: The repository identifies the project as MIT licensed. · github.com, 8 Oct 2026
Maintainer: The GitHub account for the project identifies its maintainer as Nora Schiffer. · github.com, 8 Oct 2026
Memory use: Single-threaded operation typically uses less than 100MB of RAM, though use may increase with multiple threads. · github.com, 8 Oct 2026
Minecraft compatibility: The README says it works with unmodified Minecraft Java Edition versions 1.8 through 26.1, with no mod installation required. · github.com, 8 Oct 2026
Night view: It includes an illumination layer that shows the world at night. · github.com, 8 Oct 2026
Parallel rendering: The renderer supports parallel map generation using the -j N option. · github.com, 8 Oct 2026
Performance: The README says a 3 GB save can be rendered in under five minutes single-threaded and typical single-threaded use is under 100 MB of RAM. · github.com, 8 Oct 2026
Purpose: MinedMap renders maps from Minecraft save games and provides a browser viewer for displaying and navigating them. · github.com, 8 Oct 2026
Security: GitHub reports that the project has no SECURITY.md security policy and no published security advisories. · github.com, 8 Oct 2026
Sign markers: It can show sign markers with clickable popups, and sign-layer generation is disabled by default but can be enabled and filtered with options. · github.com, 8 Oct 2026
Tile formats: Tiles use lossless compression; PNG is the default, and WebP is available as an option that the README says reduces typical file sizes by 20–25%. · github.com, 8 Oct 2026
Viewer and integration: The browser viewer is based on Leaflet and its HTML and JavaScript files can be hosted on a web server alongside generated map data. · github.com, 8 Oct 2026
Viewer hosting: The viewer must be served over HTTP because it cannot load map information from file:// URIs. · github.com, 8 Oct 2026
Web mapping library: The browser viewer is based on Leaflet. · github.com, 8 Oct 2026

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