If you only need to convert a small KML file occasionally and do not want to install any software, online converters are a convenient option. Websites such as MyGeodata Converter, GeoCzech, and others allow you to upload your KML file and download an MBTiles file within minutes. These services often support batch uploads (ZIP or 7z archives), handle coordinate system transformations, and automatically delete your data after a period of time. However, data size limits (typically up to 5 GB for the uploaded file) and privacy considerations mean this method is best for non‑sensitive data.
: Automatically estimates the maximum zoom level based on data density.
# produce geotiff with appropriate bounds (from KML LatLonBox) gdal_translate -of GTiff -a_ullr left top right bottom -a_srs EPSG:4326 overlay.png overlay_geo.tif gdalwarp -t_srs EPSG:3857 overlay_geo.tif overlay_3857.tif gdal_translate -of MBTILES -co TILE_FORMAT=PNG overlay_3857.tif overlay.mbtiles
This comprehensive guide covers everything you need to know to convert KML to MBTiles efficiently using both graphical interfaces and powerful command-line tools. Why Convert KML to MBTiles? convert kml to mbtiles
QGIS is a free, open‑source GIS application that includes a built‑in tool for generating MBTiles. This method is ideal if you already use QGIS for other geospatial tasks or prefer a point‑and‑click workflow. Starting with QGIS version 3.8, a new feature was added to generate raster XYZ layers, making it one of the easiest ways to create MBTiles without installing additional plugins.
-zg : Automatically guesses the best maximum zoom level for your data density.
C. Rasterized KML polygons to MBTiles:
Open QGIS. Create a new project. Set the project CRS (Coordinate Reference System) to . This is non-negotiable; MBTiles only works in 3857.
Load the file onto field apps like Avenza Maps , Mapbox , QField , or OsmAnd to ensure smooth offline panning and zooming.
MBTiles stores data as pre-rendered image tiles (raster) or compressed vector tiles. The rendering engine only loads the specific tiles needed for the current viewport and zoom level. If you only need to convert a small
: Click Run . Depending on the extent and zoom level range, this may take some time. QGIS will render the visible map canvas as a set of raster tiles and store them in the SQLite database.
Define the zoom levels you need (e.g., Zoom 10 to 18). Note: Higher zoom levels dramatically increase file size.
Click the browse button (...) to name your file and select where to save your new .mbtiles package. However, data size limits (typically up to 5
