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CotEditor is an open-sourced, Cocoa-based plain-text editor for OS X. It supports syntax highlighting, powerful find-and-replace with OniGmo (regular expression engine), and other small goodies for coding. It can handle also CJK languages well.

What's New

Version 3.2.1:
  • Adjust character inspector position for vertical tab.
  • Update `cot` command-line tool.
  •  Avoid creating an extra blank document if `cot` command creates a new document.
  •  Fix an issue where launching the application with `--background` option didn't make CotEditor visible.
  • Adjust line height calcuration.



  • OS X 10.10 or later

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4.8 17


Current Version (3.x)


Downloads 13,761
Version Downloads 132
License Free
Date 26 Aug 2017
Platform Intel 64 / OS X
Price Free
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