webGeoDs — Tools

Free tools for spatial analysis, with no upload to a server: they run entirely in the browser via Python in WebAssembly. The full articles behind them also cover R.

Spatial Data Quality Toolkit

A small, focused suite for checking geospatial data before you trust it. Free, no account, nothing ever leaves your browser.

Inspect → Validate → Check Topology → CRS

All four are live — Inspect, Validate geometry, Check Topology, and find/convert a CRS.

Raster Toolkit

The next family: reading a GeoTIFF before trusting anything computed from it. Started with the Raster Inspector — dimensions, bands, resolution, CRS, NoData, and per-band value ranges. A Calculator/Band Math tool is planned as the next one.

Raster Inspector & Statistics

Upload a GeoTIFF and get an instant summary — dimensions, resolution, band count, CRS, NoData, and per-band min/max/mean. Free, runs entirely in your browser: the file never leaves your computer.

Sep 6, 2026

CRS Inspector & Converter

Upload a GeoJSON or a Shapefile, find its coordinate reference system, spot a CRS that doesn’t match its own coordinates, and convert to a different CRS. Free, runs entirely in your browser: the file never leaves your computer.

Sep 6, 2026

GeoSpatial File Inspector

Upload a GeoJSON or a Shapefile and get an instant summary — feature count, geometry type, CRS, bounds, attributes, invalid/empty/duplicate geometries. Free, runs entirely in your browser: the file never leaves your computer.

Sep 5, 2026

Topology Checker

Upload a GeoJSON or a Shapefile and check it for the five recurring topology errors — overlap, gap, sliver, duplicates, dangle. Free, runs entirely in your browser: the file never leaves your computer.

Sep 3, 2026

GeoJSON & Shapefile Validator

Upload a GeoJSON or a Shapefile and check whether every geometry is valid under the Simple Features model — with the reason for each error and an optional automatic repair you can download. Free, runs entirely in your browser: the file never leaves your computer.

Sep 1, 2026