KMZ vs KML: What’s the Difference?

Introduction to KMZ vs KML

If you’ve ever used Google Earth or any mapping tool, you might have come across KML and KMZ files. Both of these file types help us show locations, routes, shapes, and even images on a map. But even though they work in similar ways, KML vs KMZ files are not the same.

Let’s break it down in a simple way. A KML file is like a plain folder that holds all your map data in a readable format called XML. This makes it easy to open, read, and edit using many tools. On the other hand, a KMZ file is like a zipped version of that folder. It compresses the KML file along with all the extra stuff that comes with it—like pictures, custom icons, or overlays—into one smaller, neater file. This makes it faster to share and easier to upload.

When you compare KMZ vs KML, the biggest difference is in how they store the data. While KML KMZ files can both show the same information, KMZ files are smaller and usually include more than just the map—it can pack everything needed into one file.

As we explore this further, you’ll learn exactly what makes them different, how to use them in your projects, and how to switch between them when needed. Whether you’re just starting with digital maps or working on large GIS projects, knowing the difference between KMZ KML files can save you time and help keep your work organized.

Are KML and KMZ Files the Same?

Many people wonder if KML and KMZ files are the same thing. While they are very closely related, they are not exactly the same. Let’s talk about how they work and what makes them different.

To start, KML stands for Keyhole Markup Language. It was first created by a company called Keyhole Inc. Later, Google bought the company in 2004 and made KML the main format used for Google Earth. This file type helps you show places, routes, or areas on a digital map. You can even add things like text, colors, and symbols. Since KML uses a type of code called XML, it’s easy for many programs to read and use.

Then came KMZ, which became more popular because of one big reason—it’s smaller in size. A KMZ file is just a zipped-up version of a KML file. But it’s more than just a smaller file. It can also pack in extra things like images, custom icons, or even 3D shapes. All of this gets wrapped into one neat file. That makes it easy to share, easy to download, and easy to open in apps like Google Earth.

When you open a KMZ file, it will unpack all the information and show everything in the right place on the map. The file still uses the same data found in a KML file—like points, paths, and shapes—but now it includes all the related pieces, such as pictures or overlays, without needing extra folders or files.

Here’s a simple way to remember the difference in the KMZ vs KML debate:

• KML files show your map data and design.

• KMZ files include that same map data plus all the extras, packed into one small file.

Even though both KML KMZ files can show the same types of things—like locations, lines, areas, and notes—KMZ just makes it easier to manage everything as one complete package. That’s why KMZ is so popular for sharing full map projects.

As we move forward, we’ll explain the main features of KML files, how they work, and how KMZ files can improve your mapping experience, whether you’re just exploring maps or working on serious GIS tasks.

Difference Between KML vs KMZ Files

When working with maps or geographic data, it’s important to understand the difference between KML vs KMZ files. Even though they look similar, they are not exactly the same. Each one works in a unique way and is used for different needs, especially when it comes to sharing data with others or using extra resources like images or models.

1. Format and File Type

A KML file is written in a format called XML, which is like plain text. It stores map data such as points, lines, and shapes that show up in apps like Google Earth or Google Maps. You can also add things like names, labels, and styles. But everything stays in one simple file.

On the other hand, a KMZ file is a zipped or compressed version of a KML file. This zipped file can also include other items like pictures, 3D buildings, or custom icons. Since everything is packed together, the file size becomes smaller, which makes it easier to share.

2. Handling Extra Resources

One of the biggest differences between KML KMZ files is how they deal with extra data. A KML file just holds the map information. If you want to add photos or extra visuals, you need to keep those in separate files and make sure they stay linked.

With a KMZ file, you don’t have to worry about missing parts. It wraps the KML file and all related materials into one single bundle. That way, nothing gets left behind when you send it to someone or upload it.

3. Easy Comparison: KML vs KMZ

Here’s a simple table to help you quickly understand the main points in the kmz vs kml comparison:

What Is a KMZ File Used For?

A KMZ file is super helpful when you need to share map data in a clean and complete way. People often use KMZ files because they bundle everything together—like the map info, custom images, icons, and even 3D models—into one small, easy-to-share file. This makes it easier for others to view the map without missing any parts.

You might use a KMZ file when you want to:

• Share maps with others by sending just one file that has all the pieces inside it. This is great for teams, classrooms, or public sharing.

• Display locations for fieldwork or research using mapping apps like Google Earth.

• Track environmental changes, like monitoring forests, rivers, or climate data.

• Create virtual tours for travel guides, tourism, or storytelling, using points of interest and pictures.

• Help with navigation by showing routes, stops, and directions for travelers or hikers.

• Support emergency teams by mapping out disaster areas, damaged roads, or relief points quickly and clearly.

One big reason why people prefer KMZ over KML is because it keeps everything in one place. You don’t have to worry about lost files or broken links. And since it’s a zipped file, it’s also much smaller and faster to send or download. Whether it’s a big project or a small trip, KMZ KML files make it simple to organize and share location-based data the smart way.

What Is a KML File Used For?

A KML file is used when you only need to share basic map information—like names, places, routes, or shapes—without adding any images or extra files. It’s a plain text format that works well when you just want to show points on a map or paths between places.

You might choose a KML file if:

• You’re sharing a simple map with no pictures or icons.

• Your images or extras are already hosted online and linked by URLs in the file.

• You want a quick way to describe paths, locations, or boundaries.

While a KML file is great for small projects or text-based mapping, it doesn’t carry images or extra resources by itself. That’s why, when comparing kml vs kmz, a KMZ file is better for complete map projects, but a KML file is perfect for quick and simple location sharing.

How to Convert Them into Both File Formats in Google Earth

If you have created a map in Google Earth and want to save or convert it to KML or KMZ, it’s very easy. Follow these steps:

Steps to Save as KML or KMZ:

1. Open Google Earth on your computer.

2. Find the Places panel on the left side.

3. Right-click on the folder or placemark you want to save.

4. Choose “Save Place As…” from the menu.

5. In the Save as type dropdown:

   • Choose KML (*.kml) to save as a KML file.

   • Choose KMZ (*.kmz) to save as a KMZ file (this is a compressed version and also includes any images or icons).

6. Give your file a name and choose where to save it.

7. Click Save.

What’s the Difference?

• KML: It’s a regular text file that stores your location data.

• KMZ: It’s the same KML data but zipped (compressed). It also includes images or custom icons if your map uses them.

Tip:

If you’re planning to share your map or upload it somewhere, it’s better to use KMZ, especially if your map includes photos or symbols. It’s smaller and keeps everything in one file.

Example of a KML File

A KML (Keyhole Markup Language) file is just a text file with special tags. Here’s a basic example:

This KML file marks a point on the map (Dubai coordinates). It can be opened with Google Earth or any GIS software.

FAQS for KML vs KMZ Files

What is a KML file used for
A KML file is used to show geographic data like points, paths, and polygons in mapping apps such as Google Earth and Google Maps. It stores location data using XML format and is readable by many GIS tools. KML is great for sharing map data in a simple, editable format.

What is a KMZ file and how is it different from KML
A KMZ file is a compressed version of a KML file. It bundles the KML data with related images or icons into one file. KMZ is better for sharing because it keeps everything together and makes the file size smaller.

How to create a KML file in Google Earth
To create a KML file, open Google Earth, create placemarks or paths, then right-click the folder or item in the left panel and choose “Save Place As.” Select KML format before saving it to your computer.

How to convert a KML file to KMZ
Open the KML file in Google Earth, then right-click the item or folder and choose “Save Place As.” In the save window, choose KMZ as the file format to convert it instantly. This compresses the KML into a KMZ.

Can KMZ files be opened in Google Maps
Yes, you can upload KMZ files to Google My Maps or open them in Google Maps using third-party tools. Just make sure the file is under size limits and doesn’t contain unsupported features.

How to edit a KML or KMZ file
You can edit a KML file using a text editor like Notepad or any GIS software. KMZ files need to be unzipped first to access and edit the KML file inside. Google Earth also lets you make changes directly and re-save.

Are KML and KMZ files supported on mobile devices
Yes, you can view KML and KMZ files on mobile using Google Earth mobile app. Some mapping apps also support these formats for offline and online use, though features may be limited.

How to convert KML or KMZ to other formats like GPX or CSV
You can use online converters like GPS Visualizer or tools like QGIS to change KML/KMZ into GPX, CSV, or Shapefiles. Just upload your file, choose the output format, and download the converted file.

Why is my KMZ file not opening in Google Earth
Your KMZ file might be too large or contain unsupported elements. Try unzipping it and checking the KML inside. Also make sure you are using an updated version of Google Earth to avoid errors.

How to compress a KML into a KMZ manually
You can convert KML to KMZ by placing the KML file and any image/icon files into a ZIP folder, then changing the extension from .zip to .kmz. This lets mapping software read it as a KMZ file.

Can I use KML and KMZ in ArcGIS or QGIS
Yes, both ArcGIS and QGIS can open and read KML and KMZ files. In QGIS, just drag and drop the file into the map view. You can also convert it into shapefiles for more advanced GIS editing.

Is it better to use KML or KMZ for sharing maps
KMZ is better for sharing because it bundles all the map data and media files into one compressed file. KML is good if you’re just sharing raw location points and don’t have custom icons or images.

How to extract images from a KMZ file
A KMZ file is just a ZIP file. Change the file extension to .zip, then unzip it. Inside, you’ll find the KML and any image or media files used in your map. This lets you reuse or update the visuals.