GeoSwap — mttwllms

GeoSwap validates and visualizes geographic coordinates, no matter the order. Paste coordinates in almost any notation, see them pinned on an interactive map, resolve ambiguous latitude/longitude order at a glance, and copy them in any format you need.

Paste anything
GeoSwap parses Decimal Degrees, Degrees Decimal Minutes, DMS, MGRS, USNG, UTM, Plus Codes (Open Location Code), Geohash, GeoJSON, WKT, GARS, GEOREF, Maidenhead, and ECEF — including messy real-world notation variants (mixed symbols, hemisphere letters, missing separators).

Never guess the order again
When input like "40.12, 74.12" could be lat/lng or lng/lat, GeoSwap shows both interpretations side by side on the map so you can instantly see which one you meant.

Convert and copy
Every result can be copied in any supported format with one click — ready to paste into GIS tools, code, or documents.

Private by design
Coordinates you enter are parsed entirely in your browser and never sent anywhere — the only network requests are to load map tiles from CARTO's public basemap CDN. The only permission used is local storage, to remember your settings.