https://geojsonlint.com/
GeoJSON Viewer & Validator
Validate your GeoJSON and display it on a map.
geojson viewervalidator
https://marketplace.visualstudio.com/items?itemName=MohammadVohra.geojson-viewer
GeoJSON Viewer - Visual Studio Marketplace
Extension for Visual Studio Code - View GeoJSON files as interactive maps and data tables
geojson viewervisual studiomarketplace