GIS

GPKG → GeoJSON

Convert spatial data from GeoPackage (GPKG) to GeoJSON instantly. This tool is designed for GIS specialists and web developers who need to display vector data in browser-based maps.

GPKG is a lightweight, SQLite-based container capable of storing multiple spatial layers, tables, and raster tiles in a single file. GeoJSON, on the other hand, is a text-based format rooted in JSON, natively supported by web mapping libraries like Leaflet and Mapbox. Converting GPKG to GeoJSON extracts your vector features from the SQLite database into a standardized geographic JSON structure, making them immediately ready for web deployment.

Geometric coordinates and attribute tables are fully preserved. However, since GeoJSON uses WGS 84 (EPSG:4326) by default, data in other projections is automatically reprojected.

Tips

Simplify complex polygon geometries in your GPKG before converting to reduce the final GeoJSON file size.
Ensure your input GPKG layers use standard vector geometries (points, lines, polygons) for optimal web rendering.
Keep attribute tables clean and remove unnecessary columns to speed up parsing in web browsers.

Common use cases

Publishing GIS vector layers directly onto interactive Leaflet or OpenLayers web maps.
Sharing lightweight spatial datasets with developers who prefer working with JSON APIs.
Integrating spatial boundaries into frontend JavaScript applications.

Why ConvertX stays free — forever

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Many image, audio, and video conversions run entirely in your browser. Your files never leave your device for those jobs. When server processing is required for documents or specialized formats, uploads are handled securely and removed automatically — typically within one hour.

File formats: what to choose

A quick guide to strengths and trade-offs of popular formats — so you pick the right one before converting.

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GIS & maps

Geographic and spatial data layers.

Common extensions: GeoJSON, KML, SHP, GPX, GPKG

Advantages

+ GeoJSON is native to web maps
+ KML works with Google Earth
+ Shapefiles are common in GIS workflows

Disadvantages

− SHP needs multiple sidecar files
− Coordinate systems must match the target
− Large datasets need simplification

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Images

Raster and vector graphics for web, print, and photography.

Common extensions: PNG, JPG, WebP, AVIF, GIF, SVG, HEIC, TIFF

Advantages

+ WebP and AVIF offer excellent compression for the web
+ PNG keeps transparency and sharp edges
+ SVG scales without quality loss

Disadvantages

− RAW and TIFF files are large and slow to share
− JPEG loses quality on every re-save
− Some formats are not supported in older browsers

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Documents

Office files, PDFs, ebooks, and plain text.

Common extensions: PDF, DOCX, XLSX, PPTX, ODT, EPUB, TXT

Advantages

+ PDF locks layout for printing and sharing
+ DOCX and ODT are easy to edit collaboratively
+ Plain text works on any device

Disadvantages

− PDF is hard to edit without special tools
− Complex layouts may shift after conversion
− Scanned PDFs need OCR for editable text

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Video

Clips, streams, screen recordings, and movies.

Common extensions: MP4, WebM, MOV, MKV, AVI, MPEG

Advantages

+ MP4 (H.264/H.265) plays almost everywhere
+ WebM is efficient for web embedding
+ MKV can hold multiple audio and subtitle tracks

Disadvantages

− High-resolution video needs lots of storage and bandwidth
− Re-encoding always takes time and may reduce quality
− Some codecs require licensing for commercial use

Frequently asked questions

Yes, all attribute columns and records associated with the vector features are fully preserved inside the properties object of each GeoJSON feature.

GPKG uses a compressed binary SQLite structure, whereas GeoJSON is plain text with repeated coordinate keys and markup, which naturally increases file size.

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