CoordConv converts coordinates between DD, DMS, DDM, UTM, MGRS, Geohash and Plus Code — instantly, in your browser. No account. No uploads. No server processing. Your data never leaves your device. Built for GPS users, GIS professionals, surveyors, drone operators and anyone who works with map coordinates. Tools included: UTM ↔ Latitude/Longitude converter、DMS ↔ Decimal Degrees converter、Batch converter — bulk convert from CSV or pasted tables