KML to KMZ Converter
Compress a KML into a Google Earth-ready KMZ in your browser — typically 70–90% smaller, valid doc.kml packaging, no upload.
Paste data or open a file
Everything runs in your browser — files are never uploaded to a server.
Field guide: KML to KMZ Converter
KML is XML, and XML is verbose — a tracing of a few hundred parcels easily produces a 15 MB file that email refuses and WhatsApp mangles. KMZ exists for exactly this: zip the KML (named doc.kml, per the OGC packaging convention) and the same map travels at a tenth of the size, opening directly in Google Earth, Google My Maps and every KML-aware GIS. This tool validates your KML's XML first, then builds the archive with the browser's native compression — showing you the before/after size so you know what you saved.
Everything happens client-side: your KML is parsed, deflated and packaged in browser memory, never uploaded. The output follows the convention strictly — a single doc.kml at the archive root — which matters because some strict consumers (Google Earth Web among them) only look for that exact entry name.
Field tips
- Validate before you ship: if your KML has an unescaped & in a description, this tool refuses to package it — better to find out now than when Google Earth shows a blank map.
- Typical compression is 70–90% for hand-drawn or exported KML; already-terse files with few coordinates compress less.
- If your map uses custom icons, KMZ is the right format to bundle them — but this tool packages the KML only; add icons with a desktop zip tool keeping doc.kml at the root.
Conversions run locally in your browser and follow the cited specifications. Always verify critical output in the target application; for survey-grade or legal data, confirm coordinate systems and datums with your GIS team.
KML to KMZ Converter — Compress a KML into a Google Earth-ready KMZ in your browser — typically 70–90% smaller, valid doc.kml packaging, no upload. Runs 100% in your browser: no upload, no sign-up, no size limits beyond your device.
About KML to KMZ Converter
KML is XML, and XML is verbose — a tracing of a few hundred parcels easily produces a 15 MB file that email refuses and WhatsApp mangles. KMZ exists for exactly this: zip the KML (named doc.kml, per the OGC packaging convention) and the same map travels at a tenth of the size, opening directly in Google Earth, Google My Maps and every KML-aware GIS. This tool validates your KML's XML first, then builds the archive with the browser's native compression — showing you the before/after size so you know what you saved.
How to use KML to KMZ Converter
- 1Open your file (or paste the data) — parsing happens locally in your browser, nothing uploads.
- 2Click Process — formats are detected and validated, with clear errors if something is off.
- 3Review the stats, warnings and preview so you know exactly what the conversion did.
- 4Download the result file, ready for your GPS device, web map or GIS.
Why use KML to KMZ Converter?
- ✓100% free, no sign-up, no file-size upsell games
- ✓Fully client-side: files and coordinates never upload to a server
- ✓Honest errors and warnings instead of silent bad output
- ✓Works offline once the page is loaded
- ✓Implements the documented standard: OGC KML 2.2 specification
Frequently asked questions
Will the KMZ open in Google Earth?+
Yes — the archive contains a single doc.kml at the root, which is the packaging Google Earth (desktop and web) expects. Double-clicking the .kmz opens it directly; in Google My Maps, import it like any KML.
How much smaller does KMZ get?+
XML's repetitive tags compress extremely well: 70–90% reduction is normal for files dominated by coordinates and placemark markup. The tool reports exact before/after sizes. Files under a few KB may see little gain (and are stored uncompressed when deflate wouldn't help).
Why does it say my KML is invalid?+
The XML failed to parse — overwhelmingly either an unescaped & character in a name/description (must be &) or a truncated copy-paste. The same file would fail silently or partially in Google Earth, so the early error is a feature. Fix the markup and re-run.
Can I bundle icons and overlay images into the KMZ here?+
This tool packages the KML itself, which covers the standard use case (geometry, styles, descriptions). For custom icon files, create the KMZ with any zip utility: put doc.kml at the root, icons in a files/ subfolder matching your href paths, and rename the .zip to .kmz.
Embed KML to KMZ Converter on your website
Want KML to KMZ Converteron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/kml-to-kmz" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="KML to KMZ Converter — ToolJolt" loading="lazy"></iframe>Related GIS tools
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