Free online PDF to KMZ converter

A map delivered as a PDF may need to open in Google Earth, be shared as a location-aware overlay, or accompany field data in a compact file. This works only when the map has usable geographic reference information or can be georeferenced before export.

PDF and KMZ formats

PDF is a fixed-layout document format used for reports, engineering drawings, scanned records, print-ready maps, and GIS map layouts. Adobe Acrobat, office applications, CAD software, QGIS, ArcGIS Pro, and web mapping systems can create PDF files.

A PDF can contain text, raster images, vector drawing objects, fonts, and layers. A GeoPDF also stores map coordinates and a coordinate reference system (CRS), allowing compatible GIS software to place its contents geographically. A scanned paper map, a standard office PDF, and many downloaded map PDFs do not contain this information.

KMZ is a ZIP-compressed package for KML data. It is used primarily by Google Earth and can contain placemarks, paths, polygons, styles, 3D models, and image overlays. For a map PDF, the normal result is a GroundOverlay: a rendered image positioned on the earth, not editable map features.

KML uses WGS 84 longitude and latitude coordinates. Conversion software reprojects a referenced source map to this coordinate system and may tile large images into a KML superoverlay, which improves loading performance in Google Earth.

Check whether the PDF is georeferenced

Install GDAL and inspect the file from a command line:

gdalinfo input.pdf

Look for a coordinate system, corner coordinates, ground control points, or georeferencing metadata. GDAL must have a PDF driver such as PDFium, Poppler, or MuPDF available. A PDF with multiple pages may appear as separate GDAL subdatasets; select the required page rather than assuming that page one is the map.

Georeferencing metadata confirms map placement, but it does not guarantee that vector lines and labels can be extracted as editable KML features. PDF drawing objects are not equivalent to GIS features with reliable attributes and geometry.

Convert a georeferenced PDF

For a raster map that GDAL reads correctly, create a tiled KMZ overlay with:

gdal_translate -of KMLSUPEROVERLAY input.pdf output.kmz

Open output.kmz in Google Earth Pro and compare roads, boundaries, or landmarks with its basemap. If the PDF contains several pages, use the applicable GDAL subdataset name as the input. Crop margins, legends, and page borders before conversion when they are not part of the map; otherwise they consume image resolution and remain visible in the overlay.

QGIS provides a desktop interface for the same workflow. Add a readable GeoPDF through Layer → Add Layer → Add Raster Layer, verify its position against a basemap, then use Export → Save As. Select the GDAL KMLSUPEROVERLAY format and save the result as .kmz.

ArcGIS Pro is a practical commercial option in ArcGIS-based workflows. Use PDF To TIFF to render the map, confirm that the resulting raster is correctly located, then use Layer To KML to create a .kmz. If the rendered TIFF has no spatial reference, georeference it before running Layer To KML.

Georeference an ordinary map PDF first

Render the relevant PDF page to PNG or TIFF at sufficient resolution, then georeference that image in QGIS. Open Layer → Georeferencer, add ground control points at identifiable locations, enter their known coordinates or pick them from a referenced map canvas, set the target CRS, choose a transformation, and save a GeoTIFF.

Use control points across the full map extent, not in one corner. Affine transformation is suitable for an undistorted map image; old, folded, scanned, or photographed maps may require a higher-order transformation or thin-plate spline, which can improve local alignment while distorting other areas. Export the resulting GeoTIFF with:

gdal_translate -of KMLSUPEROVERLAY georeferenced.tif output.kmz

Online conversion and compatibility limits

For non-confidential, already georeferenced files, MyGeodata Cloud Converter is a reasonable online option: upload the GeoPDF, select KMZ or KML output when available, and inspect the result in Google Earth Pro. Do not upload restricted maps, cadastral records, or client data to a third-party converter without confirming its retention and privacy terms.

A PDF does not become editable points, lines, and polygons merely by being converted. Editable KML normally requires the original GIS data, manual digitizing, or specialized vector extraction followed by coordinate and attribute validation.

Google Earth Pro supports KMZ overlays and tiled superoverlays reliably. Some mobile mapping applications and web viewers support only simple KMZ files, may reject large embedded imagery, or do not display tiled superoverlays. Test the output in the required target application, especially for large maps and offline devices.