KML and KMZ Viewer Online

MapGridder displays KML and KMZ files on an interactive map so you can see placemarks, paths, tracks, and the imagery inside a KMZ right away, then edit or export them. KML is the open XML format used by popular earth and map viewers, a KMZ is the zipped version of it, and the file is read on your device, never uploaded.

Open the KML viewer

What you can do

  • View KML placemarks, paths, and tracks on the map
  • Open KMZ archives without unzipping them first, imagery included
  • Inspect coordinates and labels
  • Edit points and routes, then re-export
  • Convert KML to GPX for a GPS device

Frequently asked questions

How do I open a KML or KMZ file online?

Open the map, choose Import from the File menu, and pick your .kml or .kmz file. Placemarks and paths appear on the map right away.

What is the difference between KML and KMZ?

A KMZ is a zipped KML, and it is what most earth viewers hand you when you save a file. Both open the same way here, so there is no need to unzip anything first. Imagery packed inside a KMZ lands on the map as a locked overlay, alongside the placemarks, paths, and tracks.

Is the KML viewer free?

Yes. Viewing needs no login or install, and the file is never uploaded to a server. A quick, free sign-in is only needed if you export or save maps to your account. Personal and non-commercial use is free; commercial use needs a paid license.

Can I edit the KML after viewing it?

Yes. You can move points, draw routes, and then export GPX, KML, KMZ, or GeoJSON.

What is the file size limit?

KML and GeoJSON files import up to 5 MB. A KMZ archive can be up to 25 MB, since most of its bulk is the overlay imagery, and the KML inside it is held to 5 MB.

What is the difference between KML and GPX?

Both are open XML formats for geographic data. KML is used mainly by earth and map viewers and carries rich styling and placemarks, while GPX is the common format for GPS devices and apps, focused on waypoints, routes, and tracks. If your device or app needs GPX, convert your KML with the KML to GPX converter.

Related: GPX and KML guide · Convert KML to GPX · GPX editor