Online Geoconverter

Free online converters for geospatial data:

• GeoConverter - Convert from/to many GIS formats, like Shapefile, Interlis 1, and webservice WFS(!), etc. (using OGR) - a service by Geometa Lab at HSR.
• MyGeoData - GIS Data Converter - Convert from/to many GIS formats. Uses OGR (like GeoConverter) and GDAL and supports all their formats except databases and webservices.
• Ogre - Convert form/to GeoJSON (using OGR).
• Online KML Converter - Convert Excel to KML, CSV to KML, Shapefile to KML, GPX to KML, KMZ to KML or DXF to KML.

Cloud GIS as converters:

• Geojson.io
• GIS Cloud

Online converters:

• "Play with data" (list of online geodata converters.
• OSM2KML - Converter based on OpenLayers with reader/writer for GeoJSON, OSM XML, Atom, KML, Well-Known Text (WKT) (GeoRSS, GML v2 und GML v3 funktionieren nicht immer - abhängig vom Input).

Miscellaneous converters:

• GeoJSON
  • Convert online between OSM XML and GeoJSON and back: http://aaronlidman.com/osm-and-geojson/
  • Shapefile to GeoJSON converter
• Mapshaper - Online line simplification
• Shpescape (offline?)
• GPSies - GPX converter for many GPS-related input/output formats (NOTE: only lines!)