Elixir Playground

Elixir Playground

The Elixir Playground runs OTP and Elixir in the browser. OTP's emulator is compiled to WebAssembly with Emscripten. Projects run in Web Workers, with files and databases stored locally in IndexedDB.

Create a Phoenix app with LiveView and PGlite, an empty project, or a temporary IEx session. The IDE also supports public repository imports, Git diffs, sharing links, and live collaboration.

• app/: the React IDE, browser runtime, and Playwright tests.
• beam/: the OTP emulator build and Emscripten patches.
• runtime/: site assembly (build.py) and local server (serve.py).
• tools/ and brush/: Git, command-line tools, and the shell.
• tailscale/ and tls/: Tailscale and TLS clients built to WebAssembly.
• backend/: NIF builds (with the erl_nif layer in backend/nif/), encrypted collaboration, and the TCP relay.
• tests/: the browser-test runner and the tests' NIF libraries.
• deploy/: build, upload, activation, and rollback scripts.

See Build requirements before the first build. For an existing build:

python3 -I runtime/build.py app
python3 -I runtime/serve.py 8081 \
  --domain playground.localhost:8081 --usercontent usercontent.localhost:8081
PORT=8181 tests/run.sh --project=chromium

Open http://playground.localhost:8081/. The separate usercontent domain is required to run projects. See the documentation index for architecture, setup, and feature details.

License

The playground's code is under the Apache License 2.0 (LICENSE, NOTICE). What the site serves bundles third-party software under its own licenses: docs/licenses.md, and /licenses/ on the site.