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STLmaps

Draw a box on a city map and get its terrain, roads and buildings as STL or 3MF

STLmaps is a free browser tool for a printed city block or neighborhood with buildings in their own color. Free, no account and no paid tier seen. It runs in the browser from GitHub Pages. Exports STL, 3MF, OBJ and GLB. Last checked 26 September 2026.

Open STLmaps See alternatives

Opens cioddi.github.io

What is STLmaps?

STLmaps is a free browser tool that turns a small patch of a real city into a 3D model you can print. You search for a city or pan the map, then drag or resize a box over the streets you want. The app loads elevation data and OpenStreetMap-based map tiles for that box and builds terrain, buildings, roads, footways, water, parks and land use as separate layers, with a live 3D preview below the map.

Every layer can be switched off or adjusted. You can change its color, scale building heights, shift a layer up or down, or align it to the terrain. The terrain layer adds a height exaggeration slider, a base height and a flat block option for places where the hills do not matter. The export dialog offers STL, OBJ, GLB and 3MF. GLB and 3MF keep each layer as its own object, so buildings, roads and parks can get their own filament on a multi-material printer.

It is a small hobby project by one developer, with its code on GitHub and the latest update in February 2026. It suits makers who want a city block, campus or neighborhood as a desk piece and are happy to scale the model in their slicer.

What you can make

City block and neighborhood models
Buildings standing on real terrain
Multicolor city maps with one object per layer
Hilly town models with exaggerated relief

How to use STLmaps

Search for a city or pan the map to your spot
Drag or resize the box over the area you want
Switch layers on or off and tune colors, heights and terrain exaggeration
Open the export dialog and generate an STL, 3MF, OBJ or GLB
Scale the model to size in your slicer and assign colors per layer

What you'll need to print it

Filament and parts that suit what you make with STLmaps.

Matte PLA

Multicolor PLA

Multicolor filament systems

Bambu Lab AMS lite (affiliate link) Amazon
Bambu Lab AMS 2 Pro (affiliate link) Amazon

Some of these are affiliate links: we may earn a small commission, at no extra cost to you. More about that

STLmaps pros

Free and login-free, and the model is built in your own browser
Terrain, buildings, roads, footways, water, parks and land use are separate layers you can toggle, recolor and adjust
3MF and GLB exports keep every layer as its own object, which makes multicolor city prints easy to set up in the slicer

STLmaps cons

A small one-person hobby project with little documentation and some debug options left in the panels, so settings like buffer size or median height take some trial and error
The app loads at most nine map tiles per box, so bigger areas come in at a coarser zoom and it works best for a few blocks rather than a whole region
There is no print size setting in millimeters, so you scale the model in your slicer, and each change to the box starts a rebuild that can take several seconds to half a minute