There are a number of online Elm tools that let you interact with the Elm language without requiring any local installation.
REPL
REPL
Where a read-evaluate-print-loop UI is available to execute Elm code.
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On
elmrepl.de
you can edit one Elm file and also access its declarations from a REPL input field. You can create links for sharing and also import/export state.
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With
elm.run/repl
the Elm code is compiled in your browser. You can also import the elm/json package there.
Editor
Editor
Where you can edit at least one Elm file, trigger compilation and view the result.
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elm-lang.org/try
lets you edit one Elm file. It has an interface to browse and install any Elm package.
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Ellie (Elm Live Editor)
lets you edit one Elm and one Html file. You can also save your program on the server and share a permalink to it. It has an interface to browse and install any Elm package.
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Elm Editor
can import projects from public git repositories and import/export projects from/to zip files. It supports multiple Elm files. It can install any Elm package, but you need to edit the elm.json file.
Literate/Notebook programming
Literate/Notebook programming
Where you write a (text) document, and can have interactive code segments inside.
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elm-notebook.org
comes with user management and allows to store private and public notebooks.
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The UI of
miniBill/elm-interpreter
can be used to visualize the flow of Elm code and is also useful as a step-by-step debugger. This helps greatly with understanding complex algorithms.
Code Generation
Code Generation
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json2elm
lets you paste a JSON sample and it will generate decoders and encoders for you. You can switch between different styles and packages.
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Fusion
allows you to interactively explore GET or POST requests, pick which fields you are interested in from the response, and receive generated query and decoder Elm code.
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html to elm
can convert pasted html and svg code to Elm. How the Elm packages are imported can be configured in the settings.
