Encode a latitude and longitude so scanning opens the spot in the phone's map app. It is the reliable way to point people at somewhere a street address describes badly.
Free to use, including commercially. No watermark, no sign-up.
Everything on this page is encoded directly into the pattern, so the code works forever and needs no account. The trade-off is that it cannot change and cannot be counted.
In Google Maps, right-click the exact spot and click the numbers at the top to copy them.
Latitude first, then longitude, using decimal degrees like 6.4550 and 3.3841.
Check the pin lands where you meant — a transposed pair puts it in the wrong hemisphere.
SVG for signage, PNG for screens.
Drop guests on the right entrance or car park rather than the middle of a large site.
Mark a site or access point that has no postal address at all.
Give drivers a precise pin where street naming is inconsistent.
The phone's default — Apple Maps on iPhone, Google Maps on most Androids. The code uses the standard geo format, which both understand.
The geo format takes coordinates only. If you would rather send people to a named place, use the URL type with a Google Maps share link.
Four decimal places is around 11 metres, which is enough for a building entrance. More decimals rarely help given normal phone GPS accuracy.