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GeoJSON Canvas Viewer

Edit and inspect geojson canvas viewer locally with an accessible diagram and complete export.

geojson-canvas-viewerLOCAL WORKSPACE

Enabling local controls…

Local planning inputs

Local processing without upload or storage.32KiB per field,1MiB complete result,one-second Worker deadline. Editing cancels work and clears old diagrams/exports. Edit text rows for keyboard positioning/reordering. No external map tiles or device location.

Diagram and data

Edit inputs and build. All previews are generated locally.

Processing model and limits

RFC7946 WGS84 lon/lat geometries, Feature/Collection and bounded GeometryCollection; validate finite ranges, line lengths and closed polygon rings. Equirectangular offline preview including holes; not a tile map/topology validator. Antimeridian-crossing segments are rejected with a clear message; no device location or network. Local data only. Each field ≤32 KiB; ≤200 records, ≤80 graph nodes/300 edges, JSON depth30/nodes10000, ≤2000 coordinates. Complete result ≤1 MiB; diagram ≤8 million pixels and16384px per side. Edit text to move/reorder items; build again. SVG is a readable model, not an externally rendered image.

ToolHubEN inspected controls ↗RFC7946 GeoJSON ↗

How to use this tool

Edit the labeled text fields, build, inspect the diagram and data, then copy or download JSON/SVG. Text editing provides the keyboard alternative to dragging.

When not to use it

RFC7946 WGS84 lon/lat geometries, Feature/Collection and bounded GeometryCollection; validate finite ranges, line lengths and closed polygon rings. Equirectangular offline preview including holes; not a tile map/topology validator. Antimeridian-crossing segments are rejected with a clear message; no device location or network. Local data only. Each field ≤32 KiB; ≤200 records, ≤80 graph nodes/300 edges, JSON depth30/nodes10000, ≤2000 coordinates. Complete result ≤1 MiB; diagram ≤8 million pixels and16384px per side. Edit text to move/reorder items; build again. SVG is a readable model, not an externally rendered image.