City Compare
Drag any city's true-size outline across Google Maps
Get picks like this daily. Today's launch numbers, the top launches, AI and tech news, and a daily opportunity pick, straight to your inbox.
Read the full description
A free browser extension that puts a city's real outline (from OpenStreetMap) on Google Maps and lets you drag it anywhere. It keeps its true size: the outline grows towards the poles and shrinks towards the equator, exactly as Mercator distorts areas. See area, population and density, rotate the shape, or draw your own area with a lasso. Moscow is 25x Paris; Berlin fits Paris 8.5 times. Nothing is tracked, no account. Firefox now, Chrome Web Store soon. Great for geography lessons.
Visit website ↗ Source listing ↗
PH · launched Oct 29, 2026 · 1 upvote (top 67%)
- Horizontal
- Analytics & BI
- B2C
- Not AI
- Hobby / open-source project
- Browser Extensions
- Education
- GitHub
- Maps
Similar launches
See all 177 similar launches →Could you build this?
Yes The extension fetches city boundaries from OpenStreetMap and overlays them on Google Maps with area-correct scaling. Mercator projection math is well understood, and the overlay and drag logic are standard browser extension work.
Competitors
Other products that read as similar to this one : 177 launches clear the similarity bar, closest 8 shown.
Attention rank: #85 of 178 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 343 days after the earliest competitor.
- Atlas Arrows · ph · 2026-10-01 · 2 upvotes · similarity 0.45
- Spot the City â Landmark Quiz · ph · 2026-09-26 · 1 upvotes · similarity 0.44
- Gofy · ph · 2026-09-16 · 1 upvotes · similarity 0.43
- Zuriq.ai · ph · 2026-10-29 · 1 upvotes · similarity 0.43
- Equal Earth Map â Interactive World Map · ph · 2026-09-07 · 1 upvotes · similarity 0.42
- Metro Maneuver · ph · 2026-10-29 · 1 upvotes · similarity 0.42
- A giant pixel map of London · hn · 2026-10-20 · 5 upvotes · similarity 0.41
- Put Greenland on the Moon (interactive map for size compare) · hn · 2026-01-07 · 6 upvotes · similarity 0.41