I Built a Free, Privacy-First Coordinate Converter That Runs Entirely in Your Browser

If you've ever worked with GPS data, GIS pipelines, or geospatial APIs, you know the pain: your data is in UTM, your map expects Decimal Degrees, your colleague sends you MGRS, and your database stores Geohash. Switching between coordinate formats is a small but constant friction point for developers, surveyors, drone operators, and anyone doing field work. Most online tools require sign-ups, ship your data to a server, or support only 2–3 formats. So I built CoordConv — a fast, browser-based coordinate converter that handles 7 formats in one place. What It Supports Format Example Common Use DD Decimal Degrees 40.7128, -74.0060 Google Maps, GPS DMS Degrees Minutes Seconds 40°42'46"N 74°00'21"W Aviation, nautical DDM Degrees Decimal Minutes 40°42.767'N Marine, geocaching UTM 18T 583960 4507523 Surveying, topo maps MGRS 18TWL8395907523 Military, SAR Plus Code 87G7PX7V+4H Delivery, field ops Geohash dr5regw3pg Spatial indexing, dev tools Key Features ⚡ Instant conversion — paste any forma