Browser check

This page tests the whole chain this site depends on — page → editor → Python runtime loads → Python executes → requests reaches a public API → response appears — on the device you are using now. Useful on phones and older laptops.

Run all checks

• •WebAssembly support
• •Web Workers (Python runs off the main thread)
• •Local storage (theme, progress, autosave)
• •Cross-origin isolation (soft Stop without restart)
• •Download and start Python
• •Run Python code
• •Python requests → public API (CORS)
• •Load a scientific package (NumPy)

Curated APIs reachable from this browser

Each API is called with fetch() from your browser. A failure usually means the API is down, blocked by your network, or no longer allows cross-origin requests.

Test the APIs

• •JSONPlaceholder https://jsonplaceholder.typicode.com/todos/1
• •httpbin https://httpbin.org/get?lesson=requests
• •GitHub REST API https://api.github.com/users/octocat
• •Open-Meteo https://api.open-meteo.com/v1/forecast?latitude=28.61&longi…
• •PokéAPI https://pokeapi.co/api/v2/pokemon/pikachu
• •Dog CEO https://dog.ceo/api/breeds/list/all
• •DummyJSON https://dummyjson.com/products/1
• •REST Countries https://restcountries.com/v3.1/name/india?fields=name,capit…