# GeoDataViewer

> Free online GIS viewer and converter. Open GeoJSON, Shapefile, KML, GPX, and 20+ geospatial formats directly in your browser with no upload, no install, 100% client-side processing.

## Quick Links

- [Studio (Map Viewer)](https://geodataviewer.com/studio) — Drag-and-drop GIS file viewer with attribute table, filtering, timeline, and styling
- [GeoJSON Viewer](https://geodataviewer.com/open-geojson-online) — Open, inspect, and validate GeoJSON files online
- [Shapefile Viewer](https://geodataviewer.com/open-shapefile-online) — Open SHP, DBF, SHX files with no desktop GIS
- [Format Converter](https://geodataviewer.com/geojson-to-shapefile) — Convert between 19 format families (342 conversion paths), powered by GDAL WebAssembly
- [GeoJSON Draw Tool](https://geodataviewer.com/draw) — Draw 12 geometry types and export as GeoJSON
- [GeoJSON Validator](https://geodataviewer.com/tools/geojson-validator) — Validate GeoJSON for RFC 7946 compliance
- [All Tools](https://geodataviewer.com/tools) — Distance measurement, area measurement, elevation finder, coordinate converter, and more
- [Blog](https://geodataviewer.com/blog) — GIS format guides, comparisons, and tutorials
- [Docs](https://geodataviewer.com/docs) — Documentation for uploading, attribute tables, and sidecar files

## Supported Formats

| Format | Viewer | Converter |
|--------|:------:|:---------:|
| GeoJSON (.geojson, .json) | ✅ | ✅ read/write |
| ESRI Shapefile (.shp, .dbf, .shx) | ✅ | ✅ read/write |
| KML / KMZ | ✅ | ✅ read/write |
| GPX | ✅ | ✅ read/write |
| GeoPackage (.gpkg) | ✅ | ✅ read/write |
| FlatGeobuf (.fgb) | ✅ | ✅ read/write |
| GeoParquet (.parquet) | ✅ | — |
| CSV / TSV | ✅ | ✅ read/write |
| Microsoft Excel (.xlsx) | ✅ | ✅ read/write |
| AutoCAD DXF | ✅ | ✅ read/write |
| GML | ✅ | ✅ read/write |
| TopoJSON | ✅ | — |
| WKT / WKB | ✅ | — |
| OSM PBF | ✅ | — |
| Garmin FIT | ✅ | — |
| IGC Flight Logs | ✅ | — |
| GeoTIFF / COG | ✅ | — |
| MapInfo (.tab, .mif) | — | ✅ read/write |
| File Geodatabase | — | ✅ read/write |
| SpatiaLite / SQLite | — | ✅ read/write |
| PMTiles | — | ✅ read/write |
| MBTiles | — | ✅ read/write |
| Mapbox Vector Tiles | — | ✅ read/write |
| JSON-FG | — | ✅ read/write |
| GeoRSS | — | ✅ read/write |

## How It Works

1. **Drag and drop** your GIS file into the browser
2. **View on the map** — data renders instantly with attribute table, filters, and styling
3. **Convert and export** — convert to another format using GDAL WebAssembly running locally

All processing happens in your browser via WebAssembly. No files are ever uploaded to a server.

## Technology

- **MapLibre GL JS** — GPU-accelerated map rendering with 3D terrain
- **GDAL WebAssembly** — ogr2ogr format conversion running locally in the browser
- **loaders.gl** — Format parsing for GeoJSON, Shapefile, KML, GPX, FlatGeobuf, GeoParquet
- **sql.js** — SQLite compiled to WebAssembly for GeoPackage support

## Additional Resources

- [Blog](https://geodataviewer.com/blog): GIS format comparisons, tutorials, and guides
- [Docs](https://geodataviewer.com/docs): Getting started, uploading zipped datasets, sidecar files
- [GIS Tools Directory](https://geodataviewer.com/gis-tools): 200+ free and open-source geospatial tools
- [About](https://geodataviewer.com/about): About GeoDataViewer