Welcome to Location History Visualizer, a tool to visualize what location data Google Maps has stored on you, by making a heatmap.
Don't worry—all processing and visualization happens directly on your device.How can I verify?
You can verify that no data leaves your device in two ways:
Turn off your internet connection before uploading your file. The visualizer will still work, except that the map may not load in greater detail as you zoom in.
Use Developer Tools: Open "Inspect Element" (right-click → Inspect) and go to the Network tab. Upload your file and check if any data is being sent to an external server. You'll see that all processing happens locally.
Download your data:
On Android:Phone settings → Location → Location Services → Timeline → Export Timeline data
On iOS:Google Maps app settings → Personal Content → Export Timeline Data
You should get a file ending in .json which you can upload here:
This may take a while... sit back, get a cup of tea or something.
Why does it take so long? Depending on how long Google's been tracking your location, you may have hundreds of thousands of [latitude, longitude] pairs, every one of which must be loaded, analyzed, and plotted. That's a lot of dots.
Render complete!
Successfully processed a lot of data points to generate your heatmap.
Usage tips: Zoom by scrolling, double-clicking, or using the buttons in the upper lefthand corner. Navigate by clicking and dragging. Hover over the menu in the lower lefthand corner to customize the heatmap rendering.