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Updated: March 07, 2025

.KMZ File Extension

There is only one filetype that uses .KMZ file extension and it is Compressed KML File.

Compressed KML File

File category: GIS Files
Developer: Google
Open with: Google Earth (+6 more)
Platforms: Windows, macOS, In-browser (Online), Linux, iOS, Android, iPadOS

A KMZ file is a compressed package used to store geographic data, such as custom map locations, 3D models, and images. It is essentially a ZIP file containing a KML (Keyhole Markup Language) document, which organizes placemarks, coordinates, and other geospatial details. KMZ files are commonly viewed in mapping tools like Google Earth, making them ideal for sharing location-based information.

Developed by Google, the KMZ format was introduced to reduce the size of KML files, simplifying sharing and distribution. By compressing data (often achieving a 10:1 ratio), KMZ files save storage space and transfer time, especially when emailing or publishing map content online.

KMZ files are widely used to:

  • Share placemarks (named locations with coordinates) and virtual tours.
  • Distribute 3D models (using COLLADA files) with precise geographic placement.
  • Bundle map overlays, textures, and related resources into a single file.

Common applications include education, urban planning, and tourism, where users share interactive maps or models through platforms like Google Earth.

How to Open .KMZ as Compressed KML File

You can access KMZ content using:

  • Desktop Apps: Google Earth Pro (primary tool), ESRI ArcGIS, or Global Mapper.
  • Web Tools: Upload the KMZ to a web server and enter its URL into Google Maps’ search bar. Alternatively, prefix the URL with http://maps.google.com/maps?q= to view it directly.
  • Mobile Apps: Google Earth on Android or iOS devices.
  • Manual Extraction: Rename the .kmz extension to .zip, then unpack it with tools like WinZip. This reveals the core KML file (readable in text editors) and associated resources.

Additional Details

A KMZ file typically includes a main doc.kml file and supporting folders for images or models.

Google Earth prioritizes the first KML file it finds, so including only one KML ensures correct data loading.

Some 3D software, like Blender, requires plugins (e.g., Google Earth Importer) to open KMZ content.

Applications That Open KMZ Files

Windows Apps for KMZ Files:

macOS Apps for KMZ Files:

In-browser (Online) Apps for KMZ Files:

Linux Apps for KMZ Files:

iOS Apps for KMZ Files:

Android Apps for KMZ Files:

iPadOS Apps for KMZ Files:

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