Tools to help you develop Fantom code.


F4 by Xored is a fully featured eclipse based IDE, including a debugger - written in Fantom!

F4 comes bundled with its own embedded Fantom 1.0.76 runtime, so does not require Fantom to be installed on your system.

F4 is tailered towards developing Fantom pods and projects, as oppose to individual script files. See the following for details:

The source code for F4 may be found on the GitHub F4 IDE project page.

Plugins for F4:

Netbeans Plugin

An IDE for the Fantom language based on Netbeans.

Fantom Online

Program and run Fantom code online, without installing anything!

Use Coding Ground's virtual file system and command prompt to create and run Fantom mini-projects.

Use Ideone to easily fork, run, and share Fantom samples.

Visual Studio Code

Visual Studio Code has an extension called "Fantom Syntax Highlighting" which may be downloaded in the IDE via the extensions tab.


Camebert is a lightweight, SWT based IDE that may be used for multiple programming languages, including Fantom.

Camebert itself is written in Fantom.

JetBrains - Intelli-J IDEA

JetBrains haven't produced an IDE for Fantom yet, but if you'd like them to, then lobby this issue here:

Note you must first be signed up to JetBrain's YouTrack to be eligible to vote - a 30 second process!

Text Editors

The following Text Editors have varying levels of Fantom support.

Support files are bundled with all Fantom installations and may be found in the /adm/tools/ folder.