See the Clues.
Master the Map.
GeoSherlock is an AI-powered browser extension that analyzes geographic clues from street imagery — helping you identify locations faster and sharpen your skills with every round.
Haussmann-style facades
French script, blue plaques
Plane trees, trimmed hedges
AI that reads the scene, so you can read the map.
GeoSherlock doesn't just guess — it reasons. Every analysis breaks down the visual evidence and explains exactly why each region is more or less likely.
Geographic Clue Analysis
Analyzes vegetation, architecture, signage, roads, vehicles, landscape, climate, and cultural markers in seconds.
Region Probability Engine
Returns calibrated confidence scores for possible regions, with explicit reasoning for each signal detected.
Skill-Focused Learning
Five progressive analysis modes take you from guided learning to competitive speed play — building real geo-intuition along the way.
From screenshot to answer in seconds.
Three steps is all it takes to go from a street-level scene to a calibrated location analysis.
Install the Extension
Add GeoSherlock to Chrome. Enter your Claude API key in settings. One-time setup, no account required to get started.
Capture Any Scene
Click the GeoSherlock icon on any street-level photography site — GeoGuessr, Google Street View, Mapillary, and more.
Analyze and Learn
GeoSherlock's AI breaks down the scene across 9 clue categories and returns region probabilities with full reasoning.
Built for every type of player.
Whether you're a casual player or a competitive GeoGuessr veteran, GeoSherlock adapts to how you want to engage.
5 Analysis Modes
From guided Learning mode to competitive Speed mode — choose how much help you want and build skills progressively.
Probability Bars
Calibrated confidence percentages for each region, not just a guess. Understand exactly how certain the AI is.
Meta Detector
Identifies Street View technical artifacts like camera generation, car blur, and sky tint that reveal location.
Region Elimination
Explicitly rules out regions with specific reasoning — narrowing the field of possibilities systematically.
Reasoning Replay
Animated step-by-step playback of the AI's reasoning chain — learn how to think like an expert geo-guesser.
Privacy-First
No server, no data retention. Screenshots go directly to Anthropic's API. Your key, your data, your privacy.
One tool, five ways to play.
Choose the mode that matches your skill level and what you want to get out of each session.
Learning
Beginner4-step guided walkthrough with progressive reveal
Sleuth
IntermediateProgressive hint unlock with scoring
Challenge
AdvancedBlind analysis — guess first, then reveal
Analyst
Power UserInstant full breakdown, all sections open
Speed
CompetitiveTop region + probability in ~2 seconds
MapClue is just getting started.
GeoSherlock is the first tool in the MapClue platform. We're building a suite of AI-powered geographic reasoning tools for players, researchers, and curious minds.
Start analyzing. Start learning.
Join MapClue and get access to GeoSherlock and every new tool we release.