Code Tools

Editor Tools

For an OCaml beginner, the recommended editor of choice is Visual Studio code with the ReasonML plugin.

VSCode-Reason: the Reason/OCaml plugin for Visual Studio code. It allows for all the advantages provided by Merlin with the convenience of the VSCode IDE.
merlin: the main tool used to provide information to editors about OCaml codebases. Note that to provide information, the code must first be compiled. Dune is able to automatically create /.merlin/ files, which are needed to help merlin find the compiled files.
tuareg: OCaml mode for Emacs that can run the toplevel and the debugger within Emacs.
Sublime better ocaml: better OCaml mode for Sublime Text.
- Sublime text package
ocp-index: Easy access to the interface information of installed OCaml libraries. Contains a few standalone tools:
- ocp-browser: Excellent, easily accessible ncurses-based API and documentation browser. Available independently on OPAM.
- ocp-index-top: toplevel directive for looking up documentation using ocp-index.
ocp-indent: indentation tool for OCaml, to be used from editors like Emacs and Vim.
- Vim plugin
user-setup: automatically configures several editors to use merlin, ocp-indent, and ocp-index if they are installed. Run opam install user-setup to install it, and then follow the instructions, which tell you to run opam user-setup install.

utop – Universal toplevel for OCaml with support of multiline edition, history, real-time and context sensitive completion, colors, and more. This is a must-install for every OCaml programmer.
sketch.sh: Online tool for playing around with OCaml (most up-to-date version).
Try OCaml – Try OCaml in your web browser.
codingground – Compile and execute OCaml code online.
iocaml – An OCaml kernel for the IPython notebook.
ocamlbrowser – A source and compiled interface browser, written using LablTk. Included in the standard distribution for ocaml <= 4.01 and with labltk for ocaml >= 4.02.
ghim – A command-line tool to manage Github Issues.
OCaml Yeoman Generator – Yeoman generator to scaffold OCaml modules.
Dead Code Analyzer: OCaml dead code analysis.