Lat/long, UTM, MGRS, geohash and encoded polylines — what each format is for, with free two-way converters.
Convert between MGRS grid references and latitude/longitude (WGS84) — both directions, 1 m to 10 km precision, with UTM shown. Free.
Encode lat/long to geohash and decode back — choose 1–12 characters, see the precision in metres at each length. Free, in-browser.
Encode coordinate lists to Google's polyline format and decode any encoded polyline back — precision 5 and 6 supported. Free dev tool.
Latitude/longitude into UTM zone, easting and northing — the metre-gridded coordinates surveyors, soldiers and field scientists actually measure in.
40°26′46″N to 40.4461 and back — both directions of the coordinate-format conversion every GPS, map and dataset eventually demands.
Great-circle distance between any two lat/long points — km, miles and nautical miles, with the initial bearing thrown in.
Every tool on ToolJolt is free, runs in your browser and needs no sign-up.