KML to KMZ Converter
Compress a KML document into a Google Earth KMZ archive, with styles and folders preserved exactly.
Complete the security check to begin
About Converting KML to KMZ
This is a container change rather than a data conversion, and that distinction is the point. KMZ is simply a ZIP archive whose main entry is named doc.kml — the filename Google Earth looks for first. Because your KML is already in the right language, nothing about the map data needs to be reinterpreted, so the document is validated and then wrapped exactly as it is. Styles, folder structure, screen overlays, icon references, extended data and every other part of the KML that a re-emitting converter would quietly flatten all survive byte for byte.
That fidelity is worth being explicit about, because many converters parse a KML into their own internal model and write a fresh one on the way out — which silently loses anything their model does not represent. Here the only change is compression. KML is verbose XML with long runs of repeated coordinate text, so the archive is typically much smaller than the source, and it travels as one file instead of a document plus its icons.
Common use cases
- Shrinking a large KML before emailing it or attaching it to a report
- Distributing a styled Google Earth document as a single file that opens with a double-click
- Meeting an upload limit on a portal or ticketing system that rejects the raw KML’s size
- Packaging a map for someone who should not have to keep a folder of files together
- Archiving a finished map in the compact form Google Earth itself saves to
Tips for best results
- Compression is where the win is: KML repeats coordinate text heavily, so a large document often shrinks dramatically inside the archive.
- Your styles survive intact. Because the document is wrapped rather than re-emitted, LineStyle colours, IconStyle references and folder hierarchies come through unchanged.
- The entry is named doc.kml, which is what Google Earth treats as the document root — a KMZ with a differently named KML can still work but is less portable.
- The same KML always produces the identical archive: the entry carries a fixed timestamp and permission bits, so no upload metadata ends up in the file.
How to Convert KML to KMZ Online
You can convert KML to KMZ right in your browser in under a minute. What you gain with KMZ: one self-contained file including icons and overlays.
Drag and drop your file into the upload area, click to browse your device, or paste a URL to a file hosted online. You can upload files up to 250 MB and batch convert up to 20 files at once.
Once uploaded, the conversion from KML to KMZ starts automatically. The process runs entirely in an isolated environment - your data never leaves the secure pipeline.
Your converted file is ready instantly. Click the download button to save it to your device. The file is deleted from memory immediately after download.
A more private way to convert KML files
Plenty of sites convert KML files. Very few promise never to keep them — PrivConvert does, and backs it up with how the service is built.
Each job runs in an isolated in-memory sandbox, so most conversions finish in seconds instead of waiting in a queue.
We never keep a copy. Once your KMZ is delivered, both the original and the result are gone — there is nothing left to leak or misuse.
Every conversion runs in its own locked-down process with no network access, so files can never leak or interfere with one another.
Your files are handled entirely by automated code. No staff, partner or AI model ever reads, stores or trains on your data.
KML vs KMZ - Format Comparison
| Feature | KML | KMZ |
|---|---|---|
| File extension | .kml | .kmz |
| Supported by PrivConvert | Yes (as input) | Yes (as output) |
| Privacy-safe conversion | In-memory, zero storage | |
| Max file size | 250 MB per file | |
| Batch support | Up to 20 files simultaneously | |
A converter you do not have to worry about
PrivConvert handles thousands of conversions every day for developers, designers and privacy-conscious people who need a file converted without handing over a permanent copy.