GIS

KMZ → GEOJSON

Need the other direction? GEOJSON → KMZ →

Learn about the formats: What is GEOJSON? What is KMZ?

Convert Google Earth KMZ archives containing spatial data into standardized GEOJSON files for web mapping applications. This tool allows developers and GIS analysts to seamlessly prepare proprietary earth data for modern web stacks.

KMZ is a zipped container format based on KML, primarily designed for Google Earth, which often packs spatial coordinates, icons, and embedded imagery. GEOJSON, on the other hand, is a lightweight text-based format structured in JSON, natively supported by web mapping libraries like Leaflet and Mapbox. During conversion, the archive is unpacked, parsing the internal KML geometry and attributes, and transforming them directly into a valid JSON object featuring points, lines, polygons, and their associated properties.

The conversion between KMZ and GEOJSON occurs strictly without data loss, preserving 100% of the original spatial coordinates, geometries, and attribute data. The resulting file size changes only insignificantly due to the structural shift from XML/ZIP compression to plain text JSON.

Tips

Ensure your KMZ file contains clean vector geometries rather than raster overlays, as GeoJSON is strictly vector-based.
If your KMZ includes embedded icons or custom images, remember that GeoJSON stores only references or properties, not binary image assets.
Verify the coordinate reference system, as GeoJSON mandates WGS84 coordinates by specification.

Common use cases

Publishing Google Earth geographic layers directly onto Leaflet or Mapbox interactive web maps.
Integrating proprietary field data collected in mobile KMZ viewers into modern web-based GIS databases.
Automating spatial data processing pipelines that require standard JSON payloads for REST APIs.

Why ConvertX stays free — forever

We built this project so anyone can convert files without paywalls, accounts, or hidden limits. Here is what that promise means in practice.

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Free tools today — and always

Every converter on ConvertX is free to use: no trials, no premium tiers, and no credit packs. We will never put core conversion features behind a subscription. Whether you convert one photo or a hundred files a week, the price stays zero.

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Privacy-first processing

Many image, audio, and video conversions run entirely in your browser. Your files never leave your device for those jobs. When server processing is required for documents or specialized formats, uploads are handled securely and removed automatically — typically within one hour.

File formats: what to choose

A quick guide to strengths and trade-offs of popular formats — so you pick the right one before converting.

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GIS & maps

Geographic and spatial data layers.

Common extensions: GeoJSON, KML, SHP, GPX, GPKG

Advantages

+ GeoJSON is native to web maps
+ KML works with Google Earth
+ Shapefiles are common in GIS workflows

Disadvantages

− SHP needs multiple sidecar files
− Coordinate systems must match the target
− Large datasets need simplification

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Images

Raster and vector graphics for web, print, and photography.

Common extensions: PNG, JPG, WebP, AVIF, GIF, SVG, HEIC, TIFF

Advantages

+ WebP and AVIF offer excellent compression for the web
+ PNG keeps transparency and sharp edges
+ SVG scales without quality loss

Disadvantages

− RAW and TIFF files are large and slow to share
− JPEG loses quality on every re-save
− Some formats are not supported in older browsers

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Documents

Office files, PDFs, ebooks, and plain text.

Common extensions: PDF, DOCX, XLSX, PPTX, ODT, EPUB, TXT

Advantages

+ PDF locks layout for printing and sharing
+ DOCX and ODT are easy to edit collaboratively
+ Plain text works on any device

Disadvantages

− PDF is hard to edit without special tools
− Complex layouts may shift after conversion
− Scanned PDFs need OCR for editable text

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Video

Clips, streams, screen recordings, and movies.

Common extensions: MP4, WebM, MOV, MKV, AVI, MPEG

Advantages

+ MP4 (H.264/H.265) plays almost everywhere
+ WebM is efficient for web embedding
+ MKV can hold multiple audio and subtitle tracks

Disadvantages

− High-resolution video needs lots of storage and bandwidth
− Re-encoding always takes time and may reduce quality
− Some codecs require licensing for commercial use

Frequently asked questions

Yes, all spatial geometries and attribute tables are translated directly without any loss of precision or data.

The change is minimal and stems from unzipping the binary KMZ container and restructuring the markup from KML's XML syntax to the lightweight GeoJSON text standard.

Yes, ConvertX processes your spatial files client-side or securely via optimized cloud routines, providing a ready-to-download GeoJSON instantly.

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