locking 51.5074° N, 0.1278° W
sleuth. last lock
how it works

two honest ways to find a place

Most "geolocation" tools hand you a confident pin and hope you don't check. sleuth is the opposite: we tell you which signal we used, and how sure we are.

path 1 · exact

GPS in the file

Phones and some cameras write latitude and longitude into the photo's EXIF. We read those coordinates directly — precise to the meter, no model, no guessing.

path 2 · estimate

a vision model reads the scene

No GPS? A model looks at architecture, vegetation, signage, road markings, driving side and light, and returns a country/region with a confidence score.

path 3 · honest

no signal? we say so

If neither path can answer, we tell you plainly. A wrong pin is worse than no pin — and we'd rather be trusted than impressive.

path 1

reading the GPS, locally

The EXIF block of a JPEG contains a GPS IFD with three rational numbers — degrees, minutes, seconds — plus a hemisphere reference. We parse it in your browser, before the photo ever leaves your device.

GPSLatitude = 51/1, 30/1, 26/100 // 51° 30' 26.4" GPSLatitudeRef = N // north GPSLongitude = 0/1, 7/1, 39/100 // 0° 7' 39.6" GPSLongitudeRef = W // west decimal = deg + min/60 + sec/3600 → 51.50734, -0.12767

That pair of decimals is all a map needs. We pin it, then reverse-geocode it through OpenStreetMap's Nominatim to turn coordinates into a street, city, or landmark name.

path 2

letting a model look

When there's no GPS, we send a downscaled copy of the photo to a vision model on our edge. It's trained to notice the things geoguessers notice — and we show you its reasoning, not just its answer.

architecture

roof pitch, brick, balconies, building codes — regions build differently.

signage & language

what a street sign says, and what script it's in, narrows a country fast.

vegetation & climate

palms or pines, dry or humid, snow or dust — climate is a fingerprint.

road & driving side

markings, plates, and which side cars drive on cut the map in half.

light & shadow

sun angle and direction hint at latitude and time of day.

landmarks

a tower, a mountain ridge, a skyline — occasionally a dead giveaway.

try it on your own photo

the honest answer is usually the fastest one.

Solve a photo →