Your GIS Toolbox, Online
Coordinate conversion, EPSG search, GeoJSON editing, format conversion — all in one place, no install needed.
Most Popular Tools
17 tools for coordinate conversion, EPSG search, GeoJSON editing, spatial analysis and more. Free, online, no install.
Coordinate Converter
Convert coordinates between EPSG systems with batch support and smart detection.
EPSG Search
Search and browse the EPSG coordinate reference system database.
GeoJSON Editor
Edit GeoJSON with a code editor and live map preview.
Format Converter
Convert between SHP, KML, GPX, CSV, and GeoJSON.
EPSG Finder
Find applicable EPSG codes by clicking or drawing on the map.
Measure
Measure distances and areas on an interactive map.
Why KunYu?
Browser-Powered
All computations run in your browser via WebAssembly. No file uploads, no server processing — your data never leaves your device.
17 Professional Tools
Coordinate conversion, EPSG search, GeoJSON editing, format conversion, spatial analysis — everything a GIS professional needs.
Open Format Support
Full coverage of SHP, KML, GPX, CSV, GeoJSON, WKT, and WKB. Compatible with QGIS, ArcGIS, Google Earth, and all major GIS software.
Data Privacy First
Your geospatial data stays private. Core tools run entirely in your browser — no account required to get started.
Built for GIS Professionals
Whether you're a developer, surveyor, or data analyst, KunYu has the tools you need.
GIS Developers
Quick coordinate system conversions, EPSG lookups, and GeoJSON validation during development. Copy results directly into your code.
Surveyors & Cartographers
Field coordinate picking, format conversions between DD/DMS/UTM/MGRS, and spatial measurements — all from your mobile browser.
Data Analysts
Transform geospatial data between SHP, KML, GPX, CSV, and GeoJSON. Generate buffers, simplify geometries, and validate data quality.