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MapKmlTools

Create Spatial Buffer Zones Online

Create radius buffer zones around map points and lines. Free browser tool with no upload required for secure GIS geofencing.

Frequently Asked Questions

Is KML Buffer Generator free to use?

Yes, creating buffers is 100% free.

Does KML Buffer Generator upload my files to a server?

No, the buffer geometry is generated locally with no upload required.

What file formats does KML Buffer Generator support?

Supports KML, KMZ, and GeoJSON files.

How wide can the buffers be?

You can set any custom distance in meters, kilometers, feet, or miles.

How accurate are the buffer zones?

Very accurate. The tool uses geodesic buffering on the WGS84 ellipsoid, meaning it accounts for the Earth's curvature. This gives mathematically precise circles even at large distances, unlike planar buffers that distort near the poles.

Can I buffer hundreds of points at once?

Yes. Upload a KML file with as many points, lines, or polygons as needed. The tool generates an individual buffer for every feature automatically in a single operation.

Can overlapping buffers be merged into one shape?

Yes. Enable the 'Dissolve' option to merge all overlapping and touching buffer zones into a single continuous polygon. This is ideal for creating service area maps or coverage zones.

Is my data uploaded to your servers?

No. Buffer generation runs entirely in your browser using Turf.js. Your KML data is never sent to any server.

What file size limits apply?

KML/KMZ files up to 50MB are supported. Files with thousands of features process quickly since all computation is local.

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      Buffer Settings

      Or use the map toolbar to draw points, lines, or polygons.

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      What is Buffer Generator?

      A Buffer Zone is a defined area enclosing a map feature at a specific distance. It's used in GIS to determine what lies "within X miles" of a location.

      This tool performs Geodesic Buffering, meaning it accounts for the earth's curvature to give you mathematically perfect circles, even near the poles.

      When Should You Use This Tool?

      • •You need to see which customers are within 10 miles of your store.
      • •You are creating a 'No Fly Zone' or exclusion area around a site.
      • •You need to plan a safety corridor along a pipeline route.

      How to Use Buffer Generator

      1. Upload your KML/KMZ containing points or lines.
      2. Select the layer you want to buffer.
      3. Enter the radius distance (e.g. 5) and unit (e.g. km).
      4. Click 'Generate Buffer' to see the result.
      5. Download the new buffer layer.