KML to GZ Converter
Processing entirely on your device — large files may take a moment.
Unpack a .gz into a normal file or repack it as ZIP/TAR when the receiving tool does not understand gzip. If your files are still in KML format, this page is the shortcut: KML is Google Earth’s XML markup for places, paths and polygons — still the lingua franca of consumer map sharing.
iLoveConverter processes everything locally on your computer, which makes it private and fast: no upload wait, no server storage, no limits. Add as many files as you like — batch conversion is built in.
How to convert KML to GZ
- 1
Select your files
Select your KML file.
- 2
Convert instantly
The file bytes are gzip-compressed in place — the same archive your server or build tool produces, made locally.
- 3
Download results
Download the .gz file — ready to upload, serve or attach.
About the KML format
KML (Keyhole Markup Language) started life as Google Earth’s file format and became an OGC standard. It describes placemarks, paths, polygons and even camera tours, with rich styling — which is also why it is heavier and harder to parse than GeoJSON.
Most KML files in the wild come from Google Earth exports and government portals. Converting them to GeoJSON puts the same places into any web map without a Google Earth dependency.
+Strengths
- ✓Rich styling, tours and descriptions
- ✓Google Earth and Maps read it natively
- ✓OGC standard, widely published by agencies
!Limitations
- −Verbose XML, hard to hand-edit
- −Web map libraries need conversion first
About the GZ format
A .gz file is one file squeezed by gzip — not an archive. kernel.org tarballs are “tar inside gz”, but plenty of logs, JSON dumps and CSV exports travel as plain .gz. Opening one means decompressing it back to the original bytes.
Repacking into ZIP or TAR gives the decompressed file a container that every GUI tool opens without a second thought.
+Strengths
- ✓Everywhere on Linux and macOS
- ✓Fast, well-understood compression
- ✓Streams natively from any tool
!Limitations
- −Single file only — no directory tree
- −No encryption or integrity metadata
Why convert KML to GZ?
Think of it as moving your file to the container that fits the job. Verbose XML, hard to hand-edit GZ works differently: Everywhere on Linux and macOS If any of that sounds like your task, run the conversion — it takes seconds and nothing leaves your device.
Frequently asked questions
Is this KML to GZ converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Is there a file size limit for KML to GZ?
The only limit is your device's memory, since nothing is uploaded. Files up to a few hundred megabytes work fine on a modern desktop browser; very large files simply take a little longer.
What about folders and directory structure?
The full directory tree is preserved: folders stay folders, and deep paths arrive exactly as they were packed in the KML file.
Are the files inside my KML archive modified?
No. Contents are unpacked in memory and repacked into GZ byte-for-byte — the conversion changes the container, never the files inside it.