Sites built with TopoJSON
Extension of GeoJSON that encodes topology for compact geographic data in the browser.
Get told when a new site ships with TopoJSON.
Stackdar watches every launch we detect and sends you the ones using TopoJSON, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts work880 sites
857 found by StackScope, 23 via launch platforms
- StackScope Wider Web 575
- StackScope Discovery (Indie) 282
- Product Hunt 15
- Hacker News 4
- Other 3
- PeerPush 1
TopoJSON has been detected on 880 launches we've crawled, with 61 of those in October 2026 (0.0% of the month's launches so far). The 7-day rolling share is 0.0%, roughly steady week on week. Most recent detection: World Events, today.
It's most commonly paired with D3.js, Google Fonts, and HSTS. By product type, the launches using it are most often Finance (18%), Games (10%), and Education (9%). By domain ending, launches using it are 3.6 times as likely as the average launch to live on a .org domain.
What kind of products ship with TopoJSON
253 launches
Domain endings using TopoJSON
878 sites
- .com 58.43%
- .org 7.63%
- .app 5.13%
- .io 3.64%
- .ai 2.51%
- .net 2.16%
- .online 2.16%
- .site 1.71%
- .xyz 1.48%
- .co 1.37%
- .fr 1.37%
- .uk 1.37%
- .in 1.25%
- .us 1.25%
- .dev 1.14%
Country
80 of 880 sites, where we are semi-confident of the country.
-
France
16.25%
-
United Kingdom
15.00%
-
United States
15.00%
-
India
7.50%
-
Australia
5.00%
-
Canada
5.00%
-
Germany
5.00%
-
Türkiye
5.00%
-
Brazil
3.75%
-
Netherlands
3.75%
-
China
2.50%
-
Spain
2.50%
-
Sweden
2.50%
-
Switzerland
1.25%
-
Colombia
1.25%
Share of new sites using TopoJSON
Each dot is one launch day. Line is the 7-day rolling average; weekly averages before July 2026. Chart starts at first detection.
The shaded parts of the chart are measured against a different set of sites.
Grey: until 8 July 2026 we only tracked launches from launch platforms. From that date we crawl the wider web as well.
Amber: on 10 September 2026 we improved our infrastructure so we can index new sites much sooner, often on the day they go live. Sites found that early often haven't finished setting up, so anything usually added after launch reads lower from that date. We record each site as it was when we found it.
The share is a proportion of whatever we were tracking at the time, so it can step at these lines without the technology itself changing. For a single continuous measure, switch to launch platforms.
Javascript Library leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
jQuery
|
14.43% | 34.90% |
| #2 | – |
React Router
|
6.64% | 16.07% |
| #3 | – |
Motion
|
6.13% | 14.82% |
| #4 | – |
TanStack Router
|
4.33% | 10.47% |
| #5 | – |
Swiper
|
3.58% | 8.65% |
| … | ||||
| #147 | ▼9 |
TopoJSON
Current page
|
0.02% | 0.04% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Javascript Library tool.Among September launches it ranked #157 in Javascript Library, down from #148 in August. All 1445 in Javascript Library →
Often used with
| Tool | Sites |
|---|---|
D3.js
|
738 |
Google Fonts
|
572 |
| HSTS | 405 |
| HTTP/3 | 402 |
jsDelivr
|
372 |
Tools most often detected on the same sites as TopoJSON.
Recent launches we can show
305 of the 880 sites using TopoJSON are product launches we list individually. The other 575 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works
AirSkyHero: heroes of the sky around the world
Risk Monitor
What's across the ocean from me? | What's Across
Signlore
Education
FRDT — Freight for Real Driver Tools | Load Board & Freight Software for Carriers
Productivity
Hop on Truck – ride along with live Euro Truck Simulator 2 and ATS streamers on a map
Games
SILUSO · Camino Éthique
Orbis – das tägliche Geografie-Rätsel
Origo · Tap where it happened
Games
Orbseer · The world on one page
Content
Ma vigilance
Showing the most recent 12 of 305.
The StackScope API serves all 880 sites using TopoJSON, filterable and exportable, from £15 a month.