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CotEditor is an open-sourced, Cocoa-based plain-text editor for macOS. It supports syntax highlighting, has a powerful find-and-replace with the regular expression, and other small goodies for coding. It can handle also CJK languages well.

What's New

Version 3.3.5:
  • Update "Swift" syntax style for Swift 4.1.
  • Fix an issue where the application could rarely crash under specific environment on saving.
  • Fix an issue where the domain part was ignored when a favicon was dropped from Safari to editor.
  • Update YAML syntax style to fix outline extraction with a specific case.


  • OS X 10.11 or later

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CotEditor User Discussion

4.4 20


Current Version (3.x)


Downloads 15,268
Version Downloads 136
License Free
Date 11 Mar 2018
Platform Intel 64 / OS X
Price Free
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