GISConverter is a free tool for converting geospatial file formats, KML, KMZ, Shapefile, GeoJSON, GeoPackage, GML, GPX, DXF, CSV and Excel, without uploading anything.
Instead of sending your file to a server, GISConverter runs a full GDAL engine that has been compiled to WebAssembly and loaded into your browser. When you drop a file, it is read, transformed, and written back to a downloadable file entirely on your own device. The engine downloads once (a few megabytes) and is then cached, so later conversions are fast and work offline.
It is private (files never leave your computer), it is free to run at any scale (there is no server doing the work), and it is built on open standards (GDAL/OGR, EPSG/OGC) rather than a proprietary lookalike. That combination is unusual: most online converters upload your data to a server you have to trust, whereas here the work happens where the data already is.
Surveyors, GIS analysts, developers, drone pilots, urban planners, students and hobbyists all need to move data between the formats their tools speak. GISConverter covers the vector, tabular, CAD and GPS conversions people search for most, with a page and a clear explanation for each.
A few formats (such as AutoCAD DWG and Apache Parquet) require components that are not available in the WebAssembly build, so they are not offered here.
GISConverter is built and maintained by Ghulam Hasnain, a PhD researcher in Space Science & Technology who works with GIS and remote-sensing data daily across QGIS, ArcGIS and Google Earth. The site began as a personal fix for a recurring problem: needing to convert sensitive survey data without uploading it to a stranger's server. Every converter and article on the site is written and tested by him; the editorial policy explains how.
Feedback, bug reports and format requests are welcome at hello@gisconverters.com.
