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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 3.2.4:
  • Keep showing the console when CotEditor becomes inactive.
  • Make the Key-Bindings for "Bigger" and "Smaller" actions in Font menu customizable.
  • Change to display the first line number even the document is empty.
  • Rename "Incompatible Characters" toolbar item to "Incompatibles".
  • Some minor UI improvements and fixes.



  • OS X 10.10 or later

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4.8 17


Current Version (3.x)


Downloads 14,035
Version Downloads 81
License Free
Date 05 Nov 2017
Platform Intel 64 / OS X
Price Free