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 format, get all 7 outputs at once
- 🗺️ Interactive map preview — verify your location visually before copying
- 📋 One-click copy for every output format
- 📦 Batch Converter — handles CSV files or pasted tables with hundreds of rows
- 🔄 Lat/Lon and Lon/Lat order toggle (because GeoJSON vs GPS is a real gotcha)
- 🎯 6 decimal place precision (~±0.11 meters accuracy)
Try It
Specific tools:
Happy to answer questions about how the projection math works under the
hood, or how to handle the WGS84 vs NAD83 vs GCJ-02 datum differences
in your own projects. Drop them in the comments! 🗺️
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