jsonpost
Generators & Utilities

GeoJSON Viewer / Validator

Validate GeoJSON and preview geometries on an interactive map.

Runs entirely in your browser — your data never leaves your device.

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How to use this tool

  1. 1Paste your GeoJSON into the editor.
  2. 2See validation results and a map preview of the geometries.
  3. 3Fix any reported coordinate or structure errors.

Frequently asked questions

What geometry types are supported?
Points, LineStrings, Polygons, and their Multi variants, as well as FeatureCollections.
Does the map load my data externally?
Map tiles come from a public tile provider, but your GeoJSON itself is parsed and rendered locally in your browser.
Is my data uploaded to a server?
No. Every tool on JSONPost runs entirely in your browser using JavaScript. Your JSON never leaves your device, so it is safe to use with private or sensitive data.

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