CotEditor for Mac

CotEditor for Mac

By : CotEditor Team

( Open Source )

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  • License
    Open Source
  • Version
  • Requirements
    Mac OS X 10.11 or later
  • Date added
    Jun 06, 2018
  • Website
  • OS Type

CotEditor for Mac is a open-sourced, Cocoa-based plain-text editor for OS X.

It supports syntax highlighting, strong find-and-replace with OniGmo (regular expression engine), and other small goodies for coding. It may handle also CJK languages nicely.

CotEditor is just made for macOS. It looks and acts just as macOS applications should. CotEditor for Mac launches so fast you could write your text immediately once you want to. CotEditor is designed as an open-source project which allows everyone to contribute.


Syntax Highlighting
Colorize over 50 pre-installed major languages like HTML, PHP, Python, Ruby or Markdown. It is also possible to make your personal settings.

Split Editor
Split a window into several panes to view unique sections of your document at the exact same time.

Powerful Find & Replace
Super powerful find and replace using the ICU regular expression engine.

Character Inspector
Inspect Unicode character data of each selected character in your file and display them in a popover.

Setting via Click
There aren't any complex setting files that require geek knowledge. You may access all your preferences including syntax definitions and topics from a normal preferences window.

Make your own macro in your favorite language, while it is Python, Ruby, Perl, PHP, UNIX shell, AppleScript or even JavaScript.

Auto Backup
You don't need to lose your unsaved data anymore. CotEditor for Mac backups your files automatically while editing.

Incompatible Characters
Assess and list-up the characters in your document that cannot be converted into the desired encoding.

Outline Menu
Extract specified lines together with the predefined syntax and you can jump to the corresponding line.

CJK Language Friendly
Estimate different file encodings accurately, toggle to vertical text style and maintain its line height correctly.

trivial: Let input fields in preferences support dark mode (hidden option on the current systems)
non-AppStore ver.: Update Sparkle framework

Fix an issue under OS X 10.11 where the application crashed with the auto completion
Fix an issue where some syntax keywords were not highlighted correctly
Improve general stability
trivial: Fix drawing of capsules for variables in the insertion format setting field

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