100% Private
Your geographic data never leaves your device. Map tiles load from OpenStreetMap, but your files stay local.
Free Online Map & GIS Viewer
Visualize geographic data on interactive maps. Open GeoJSON, GPX, KML, KMZ, and Shapefile formats directly in your browser. Powered by Leaflet and OpenStreetMap — 100% private.
🔒 100% Private
🗺️ Interactive Maps
📍 5 GIS Formats
Map & GIS Viewers
Choose the viewer that matches your geographic data format
GeoJSON Viewer
View GeoJSON geographic data on an interactive map with feature properties, popup details, and auto-fit bounds.
Open GeoJSON Viewer →GPX Viewer
View GPS tracks, routes, and waypoints with elevation profiles, distance, and speed statistics.
Open GPX Viewer →KML Viewer
View Google Earth KML files with placemarks, paths, polygons, and coordinates on interactive maps.
Open KML Viewer →KMZ Viewer
Extract and view compressed KML archives with embedded resources and overlays.
Open KMZ Viewer →Shapefile Viewer
View ESRI Shapefiles on an interactive map with attribute tables. Upload as a ZIP archive.
Open Shapefile Viewer →Visualize Geographic Data Without GIS Software
DataViewer renders your geographic files on interactive Leaflet maps with OpenStreetMap tiles — right in your browser. No need to install QGIS, ArcGIS, or Google Earth.
Our map viewers are perfect for:
- Outdoor activities — Review hiking, cycling, or running GPX tracks with elevation profiles
- Urban planning & GIS — Visualize Shapefiles and GeoJSON boundaries
- Google Earth data — Open KML/KMZ exports with placemarks and paths
- Logistics & fleet — Plot GPS routes and waypoints on maps
- Data journalism — Preview geographic datasets before analysis
Features Across All Map Viewers
- Interactive MapsPan, zoom, and click features on Leaflet maps
- Auto-Fit BoundsMap automatically zooms to fit your data
- Feature PopupsClick features to see properties and attributes
- Elevation ProfilesGPX tracks display elevation and distance charts
- Attribute TablesView feature properties in organized tables
- 100% Client-SideAll processing happens locally — files never leave your device
Why Use DataViewer for GIS Data?
The fastest way to preview geographic data online
No Software Needed
Skip installing QGIS or ArcGIS. View Shapefiles, KML, and GeoJSON in seconds with just a browser.
Stats & Profiles
GPX tracks come with elevation profiles, distance, speed, and duration statistics built-in.
Works Everywhere
Touch-friendly maps work on desktop, tablet, and mobile. Preview files from anywhere.
Map & GIS Viewer FAQ
What GIS file formats are supported?
We support five popular geographic formats: GeoJSON (the web standard for geographic data), GPX (GPS tracks from fitness devices and apps), KML (Google Earth format), KMZ (compressed KML archives), and ESRI Shapefiles (uploaded as ZIP archives).
Can I view GPS tracks from my fitness watch?
Yes! Export your activity as a GPX file from Garmin, Strava, Komoot, or any GPS device, then drop it into our GPX viewer. You'll see the track on a map with elevation profile, distance, and speed stats.
How do I view a Shapefile?
Shapefiles consist of multiple files (.shp, .shx, .dbf, etc.). Compress them into a single ZIP file and upload it to our Shapefile viewer. The viewer will extract and render the data automatically.
Are my map files uploaded to a server?
No. Your geographic files are processed entirely in your browser. Only the map tiles (the background map) are loaded from OpenStreetMap — your actual data never leaves your device.
What's the difference between KML and KMZ?
KML (Keyhole Markup Language) is an XML-based format for geographic data, used by Google Earth. KMZ is simply a compressed (zipped) version of KML that can include embedded images and overlays. Both are fully supported.
Can I click on map features to see details?
Yes! All map viewers support interactive popups. Click on any placemark, path, polygon, or feature to see its associated properties and attributes.