Sites built with Emscripten
WASM compiler toolchain; /userfs is Emscripten's persistent virtual filesystem IndexedDB
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See how alerts work194 sites
184 found by StackScope, 10 via launch platforms
- StackScope Wider Web 157
- StackScope Discovery (Indie) 27
- Hacker News 9
- Other 1
Emscripten has been detected on 194 launches we've crawled, with 21 of those in September 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: Racemaster – Free Online Racing Game, today.
It's most commonly paired with Godot Engine, Cloudflare DNS, and HTTP/3. By product type, the launches using it are most often Games (59%), Developer Tools (11%), and AI (10%). By domain ending, launches using it are 4.3 times as likely as the average launch to live on a .online domain. The 10 scored launches using Emscripten average a StackScope score of 3.0 out of 10, against 6.4 across all launches we score.
What kind of products ship with Emscripten
63 launches
Domain endings using Emscripten
194 sites
- .com 44.33%
- .online 13.40%
- .io 7.22%
- .xyz 7.22%
- .app 5.67%
- .net 5.67%
- .dev 2.06%
- .in 1.55%
- .org 1.55%
- .site 1.55%
Share of new sites using Emscripten
Each dot is one launch day. Line is the 7-day rolling average; weekly averages before June 2026. Chart starts at first detection.
The shaded part of the chart is measured against a different set of sites. Until 8 July 2026 we only tracked launches from launch platforms; from that date we crawl the wider web as well. The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.
How StackScope detects technologies
⋮ Jul 1, 2026: Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery.
Javascript Library leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
jQuery
|
14.39% | 34.45% |
| #2 | – |
React Router
|
6.79% | 16.26% |
| #3 | – |
Motion
|
6.69% | 16.02% |
| #4 | – |
TanStack Router
|
4.26% | 10.20% |
| #5 | – |
Swiper
|
3.64% | 8.72% |
| … | ||||
| #220 | ▼14 | Emscripten Current page | 0.01% | 0.02% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Javascript Library tool.Among August launches it ranked #224 in Javascript Library, down from #210 in July. All 1099 in Javascript Library →
Often used with
| Tool | Sites |
|---|---|
Godot Engine
|
100 |
Cloudflare DNS
|
89 |
| HTTP/3 | 88 |
Cloudflare
|
83 |
| HSTS | 50 |
Tools most often detected on the same sites as Emscripten.
Recent launches we can show
37 of the 194 sites using Emscripten are product launches we list individually. The other 157 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
The Choicer Voicer Online - Play Voice Over Game
Games
LumoLend — Mortgage Pricing in Minutes | Purchase · Refi · DSCR · HELOC
Finance
Сервис видеоконференций — создать видеоконференцию | Sotwork
Mythreach
Games
TypeCraft — Type, Gather, Build
Turn Soccer Tactics
ColonyCell | 18650 Battery Pack Builder & Optimizer
JellyChess: 3D Online Chess in Your Browser
Games
Sudoku — Free Online Puzzle
Games
santoku
Developer Tools
3D Pinball Space Cadet – Play Online Free with Leaderboards
Games
Showing the most recent 12 of 37.
The StackScope API serves all 194 sites using Emscripten, filterable and exportable, from £15 a month.