Drop FlatGeobuf files
Import .fgb files directly into your browser. FlatGeobuf's spatial index enables fast streaming and filtering of large datasets.
Format viewer
FlatGeobuf Viewer & Converter
View, analyze, and convert FlatGeobuf (.fgb) files directly in your browser. Perfect for QGIS users and ArcGIS professionals who need quick file inspection without opening desktop software. Leverage spatial indexing for fast queries and streaming support for large datasets. No backend, no installation—completely free.
What is FlatGeobuf?
FlatGeobuf is a performant binary encoding for geographic data. It features a spatial index optimized for HTTP range requests, making it ideal for cloud-native and streaming workflows. FlatGeobuf files (.fgb) can be read partially without downloading the entire file, perfect for web mapping applications.
FlatGeobuf viewer features
Query with DuckDB SQL
Run spatial SQL queries on FlatGeobuf data using DuckDB WASM. Filter by bounding box, join with other datasets, and aggregate features.
Visualize on the map
Preview FlatGeobuf geometries with streaming support. The built-in spatial index makes map rendering fast even for large files.
Convert FlatGeobuf to multiple formats
Export your FlatGeobuf data to any of these formats with one click. All conversions happen locally in your browser using DuckDB's export engine.
GeoJSONGeoParquetCSVParquetArrow/FeatherDuckDBSQLiteNDJSON
Why use Geoverse for FlatGeobuf files?
Streaming support for large files
Spatial index for fast queries
100% client-side processing
No installation required
Built-in spatial functions
Export to multiple formats
Start viewing FlatGeobuf files now
No signup, no installation. Drop your .fgb file and start exploring with spatial indexing support.
Launch FlatGeobuf viewer