Convert KML to KMZ online
Convert Keyhole Markup Language (KML) — the Google Earth and Google Maps format — into zipped KML (KMZ), which is the compressed Google Earth format that packs KML plus its assets into one file. Drop your KML file below, KMZ is already selected as the output, and download the result. Everything runs in your browser and the cloud; you never install anything.
Upload your file
Drag and drop it into the converter below. A free account comes with three welcome conversions.
Convert in the cloud
MapGO detects the format and produces your download in seconds.
Download & keep it
Files are deleted automatically after 48 hours.
Files are deleted automatically after 48 hours. Your files are never shared.
Why convert KML to KMZ with MapGO?
Most online converters take one file and hand back one file. MapGO is built on a real geospatial engine, so a single upload can do more.
- Several outputs in one upload
Tick KMZ and any other formats you need; every selected format is delivered from the same file.
- Files up to 5 GB
Far beyond the browser-based converters that choke past a few hundred megabytes.
- Reproject while you convert
Set a source and target EPSG code and the coordinate system is changed during the conversion, no second tool needed.
- Private by default
Files are deleted automatically after 48 hours.
KML vs KMZ at a glance
| KML | KMZ | |
|---|---|---|
| Typical use | Google Earth / Google My Maps visualisation and sharing placemarks | Sharing Google Earth maps as a single compressed file |
| Size on disk | Verbose XML; the zipped KMZ variant shrinks it considerably | Small — it is a zip archive of KML plus images |
| Attribute support | Styling-first — data lives in ExtendedData and is easy to lose | Same as KML: data lives in ExtendedData |
| Software support | Google Earth/Maps and most GIS tools | Google Earth/Maps and most GIS tools |
| Web-friendliness | Good inside the Google ecosystem; niche elsewhere | Needs conversion for web maps |
Other ways to convert KML to KMZ
You don't need an online tool for this. If you have GDAL installed, one command does it.
In QGIS (free): open your KML via Layer → Add Layer, then right-click the layer → Export → Save Features As… and pick KMZ as the format.
The MapGO converter above is for when you don't want to install anything, need to convert to several formats at once, or are handling files too large for a desktop machine.
ogr2ogr -f "LIBKML" output.kmz input.kmlKML to KMZ: frequently asked questions
Is the KML to KMZ converter free?
Partly. Every new account gets three welcome conversions for free, so you can try KML to KMZ without paying. After that, you can either buy a credit pack and pay per conversion, or take a subscription, which gives you unlimited conversions within the plan's file-size limit. There is nothing to install; the whole conversion runs in the cloud.
Is my data kept private?
Conversion is fully automated and your file is never shared. Files are deleted automatically after 48 hours. Download your KMZ result and it's yours to keep.
What does the KMZ output contain?
You get a clean zipped KML (KMZ) file with your geometry and attributes preserved, ready to open in the tools that read KMZ.
What happens to the attributes stored in my KML?
KML keeps attribute data in ExtendedData elements (and sometimes in free-text descriptions). Structured ExtendedData fields are mapped to real attribute columns in the output; icons and styling are display settings rather than data, so they don’t carry over.
Can I convert KMZ back to KML?
Yes — use our KMZ to KML converter for the reverse direction. MapGO supports conversions in both directions between these formats.
Also convert
See it on the map first.
Open your KML in the workspace, check the shapes and attributes, then convert and download from the same place.