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CotEditor

CotEditor is a Cocoa-based plain-text editor specifically for Mac OS X.

Operating system
Mac
File size
25.50 MB
License
OpenSource under LGPL
Last updated
Apr 28, 2026
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Overview

What is CotEditor?

CotEditor is a Cocoa-based plain-text editor specifically for Mac OS X.

In depth

A closer look at CotEditor

CotEditor is a Cocoa-based plain-text editor specifically for Mac OS X. The app supports syntax highlighting and it has powerful find-and-replace functionality with OniGmo. Key Features include:
  • Syntax Highlighting: Colorize more than 40 pre-installed major languages like HTML, PHP, Python, Ruby or Markdown.
  • Find & Replace: Powerful find and replace using OniGmo regular expression engine.
  • Setting via Click:
    • You can access all your settings including syntax definitions and themes from a normal preferences window.
  • Auto Backup: CotEditor backups your documents automatically while editing.
  • Outline Menu: Extract specified lines with the predefined syntax and you can jump to the corresponding line.
  • Split Editor: Split a window into multiple panes to view different area simultaneously.
  • Character Inspector:Inspect unicode character data of each selected character in your document and display them in a popover.
  • Scriptable: Make your own macro in your favourite language. CotEditor supports Python, Ruby, Perl, PHP, UNIX shell or AppleScript(and JavaScript on Yosemite).
  • Incompatible Characters: Check and list-up the characters in your document that cannot be converted into the desired encoding.
  • CJK Language Friendly: Estimate various file encodings accurately, toggle to vertical text mode and keep its line height correctly.

Requirements

System requirements

Mac OS X

Verdict

Should you download CotEditor?

CotEditor runs on Mac and is available under the OpenSource under LGPL license — the installer is 25.50 MB. We’ve catalogued it under Editors.

Verified clean. Every CotEditor build on SoftLookup is scanned for viruses, spyware, adware, trojans and backdoors. We re-test on every update.
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At a glance

CotEditor specifications

Category
Editors
Publisher
CotEditor Project
Last updated
Apr 28, 2026
Requirements
Mac OS X
License
OpenSource under LGPL
Operating system
Mac
File size
25.50 MB
Price
Free
Page views
535

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