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Komodo Edit - a free, open source editor

Komodo Edit, based on the Komodo IDE, offers sophisticated support for all major scripting languages, including in-depth auto complete and call tips, multi-language file support, syntax coloring and syntax checking, Vi emulation, Emacs key bindings.

Komodo Edit: Auto complete and call tips


Multi-language editor

Advanced support for:

  • Browser-side languages: CSS, HTML, JavaScript and XML.
  • Server-side languages: PERL, PHP, Python, Ruby and Tcl.
  • Web template languages: RHTML, Template-Toolkit, HTML-Smarty and Django.

Auto complete and call tips

  • Write code faster and shorten the learning curve with code completion that guides you as you work.
  • CSS, HTML, JavaScript, PERL, PHP, Python, Ruby, Tcl, XML and XSLT.
  • Schema-based XML/HTML completion.
  • Multiple-language file support, such as CSS and JavaScript completion in HTML.
  • Support for adding third-party libraries.
  • Interpreter version differentiation of built-in and standard library information.

Multi-language file support

Correct syntax coloring of multi-language files and templated files, common in many web programming frameworks. Add custom language support (User-Defined Languages or UDL, used to provide support for RHTML, Template-Toolkit, HTML-Mason, Smarty and Django).

Standard editing features

Code commenting, auto-indent and outdent, block selection, incremental search, reflow paragraph, join lines, enter next character as raw literal, repeat next keystroke and clean line endings on “save”.

Syntax checking

Instant feedback for all fully-supported languages.

Syntax coloring

Spot errors easily and improve readability and context, even in multi-language files (unique to Komodo!).

Vi emulation

Modal Vi key bindings emulate navigation, text insertion and command behavior. Custom commands can be implemented by adding Komodo macros to a Vi Commands Toolbox folder.

Emacs key bindings

Emacs-like key binding scheme supports new editor features modeled on Emacs, such as transient marks (similar to the Emacs “mark ring”), repeat next command and reflow paragraph.

HTML preview

Check HTML, XML and CSS files side-by-side or in a browser, using arbitrary files or URLs.

Multilingual Input Method Editor (IME) support

Use your standard keyboard to enter multi-byte characters, such as Simplified Chinese, Japanese and Korean.

Code snippets

Store any piece of code for reuse.

Code folding

Work quickly and efficiently with large sections of code.

Multi-document editing

Easily work on multiple documents simultaneously using multiple tab groups, split view, and cross-document search.


Easily master editing features.

Project manager

Komodo Edit: Project manager

Convenient, flexible organization of all project elements.

Live Folders

Project view displays the current contents of corresponding file system directory.

Virtual Folders

Explicitly maintained multi-purpose containers for any project or Toolbox component, containing pointers to selected components from different file system locations.


Komodo Edit: Toolbox

Store it

Store virtually anything, including configurable “Run” commands, macros, code snippets, URLs, Live and Virtual Folders, templates, menus, toolbars and remote files.

Share it

Share a Toolbox with networked team members or distribute valuable Toolbox items to other Komodo users with the import/export function.


Komodo Edit: Extensibility

XPI Extensions

Create your own plug-ins. XPI extension support provides the same capability as Firefox, with all standard Mozilla APIs based on XUL, XBL, and XPCOM, plus our own for Python and JavaScript. We’re even using this in Komodo development; for example, when adding UDL-based languages and defining custom language syntax-coloring. Other new features, such as the DOM Viewer, are also extensions. With full documentation and an active community providing support, Komodo Edit power is as boundless as your imagination.

» Komodo Edit Homepage
» Komodo extensions
» Komodo forum

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