CotEditor

詳細情報

タイトル CotEditor
URL http://coteditor.com/
バージョン ver 6.0.3
更新日 2025/09/25
追加日 2013/08/17
種別 フリーソフト
説明 行番号表示、シンタックスカラーリング、OgreKit を使用した正規表現検索、ウィンドウの透明度設定などの機能を持つテキストエディタ。

レビュー

CotEditorは日本生まれのOS X専用のテキストエディタ。エンコーディングの判定や和英が混ざった文書の描画、縦書き表示など日本人向きの機能が豊富に搭載されていることが特徴です。

もちろんそれだけではなく、HTML/PHP/Python/Rubyなど40のメジャーな言語に対応したシンタックスハイライト機能、アウトラインメニュー、ビューの分割機能、スクリプトによるマクロの定義などエディタとしての機能も充実。

VimやEmacsは高機能ですがその分設定も複雑になりがちなので、シンプルに使えるエディタとしてCotEditorは便利に使えそうです。。

現在CotEditorはオリジナル開発者nakamuxu氏の手を離れ、usami-k氏、1024jp氏などが開発されているそうで、ソースコードはGitHubで公開されています。

スクリーンショット

更新グラフ

バージョン履歴

6.0.3

system requirements: macOS 15 and later

Improvements

  • Change the default editor font size to 13 pt.

Fixes

  • Fix an issue on macOS 15 where the horizontal scroller appears in editors even when setting lines to wrap.
  • Address a potential crash on macOS 26 that can occur when opening a document.
6.0.2

system requirements: macOS 15 and later

Fixes

  • Fix an issue on macOS 26 where the application crashes by opening the Donation settings pane while a system theme color other than Multicolor is selected in the System Settings > Appearance.
  • Fix an issue where the theme setting changes unexpectedly when opening the Appearance settings pane after switching the system appearance mode.
  • Fix an issue where the indentation style detection doesn’t work.

Full Changelog: 6.0.1...6.0.2

6.0.1

Improvements

  • Avoid assigning the Shift+Return shortcut key for a snippet.
  • [trivial] Update find result messages.
  • [dev] Update the build environment to Xcode 26.0.
  • [non-AppStore ver.] Update Sparkle from 2.8.0-beta.3 to 2.8.0.

Fixes

  • Fix an issue where the file browser doesn't show the entire filenames when the scroller slot is shown.
  • Fix an issue where the “Convert Indentation” commands don’t convert if no characters are selected.
  • Fix an issue where the input fields in the Find window accept rich text.
  • Address a potential crash on macOS 26 that occurs when performing a keyboard shortcut.
  • Address a potential crash on macOS 26 that can occur when opening a document on an Intel-based Mac.
  • [trivial] Fix an issue where the default
(省略されました)
6.0.0

system requirements: macOS 15 and later

New Features

  • Support macOS Tahoe 26.

Improvements

  • Change the system requirement to macOS Sequoia 15 and later.
  • Update the user interface on macOS 26 to the Liquid Glass style.
  • Update the application icon to the Liquid Glass style.
  • The options to highlight matching braces have been removed and they are now always highlighted.
  • Apply the text find highlighting to all split editors.
  • Move selected items to the Trash by the Delete action in the file browser.
  • Show also the file size of the previewed document in the status bar.
  • Display the numbers of registered items below the lists in the syntax editor.
  • Deprecate the feature to change t
(省略されました)
6.0.0-rc.2 Pre-release
Pre-release

system requirements: macOS 15 and later

Improvements

  • [rc] Update screenshots in the User Guide.
  • [rc] Update the Portuguese localization.

Fixes

  • Fix an issue where the size of the Multiple Replace window is not stored.
  • [rc] Fix an issue where the cursor in the input fields within the Find window can move unexpectedly.
  • [beta] Fix an issue where the first multiple replace definition could be cleared when the setting window appears.

Full Changelog: 6.0.0-rc...6.0.0-rc.2

6.0.0-rc Pre-release
Pre-release

system requirements: macOS 15 and later

Improvements

  • Display the numbers of registered items below the lists in the syntax editor.
  • Deprecate the “Make Snake Case,” “Make Camel Case,” and “Make Pascal Case” commands in the Text > Transformations menu.
  • [dev] Migrate the input fields in the Find window to SwiftUI.
  • [non-AppStore ver.] Update Sparkle from 2.7.1 to 2.8.0-beta.3.
  • [beta][dev] Update the build environment to Xcode 26.0 RC.

Fixes

  • [beta] Fix an issue where the text color in the text fields within the Find window appears black in the dark mode.
  • [beta] Fix the border color of setting lists in the settings win
(省略されました)
6.0.0-beta.2 Pre-release
Pre-release

system requirements: macOS 15 and later

Improvements

  • [beta] Adjust the user interface.
  • [beta] Avoid tinging folder with tags in the file browser on macOS 15.
  • [beta] Tweak the application icon.
  • [beta][dev] Update the build environment to Xcode 26.0 Beta 7.

Full Changelog: 6.0.0-beta...6.0.0-beta.2

6.0.0-beta Pre-release
Pre-release

system requirements: macOS 15 and later

New Features

  • Support macOS Tahoe 26.

Improvements

  • Change the system requirement to macOS 15 Sequoia and later.
  • Update the user interface on macOS 26 to the Liquid Glass style.
  • Update the application icon to the Liquid Glass style.
  • The options to highlight matching braces have been removed and they are now always highlighted.
  • Apply the text find highlighting to all split editors.
  • Move selected items to the Trash by the Delete action in the file browser.
  • Show also the file size of the previewed document in the status bar.
  • Dep
(省略されました)
5.2.3

system requirements: macOS 14 and later

Improvements

  • Update the CSS and Go syntaxes to highlight more keywords (thanks to Karam!).
  • [dev] Update Yams from 6.0.2 to 6.1.0.

Full Changelog: 5.2.2...5.2.3

5.2.2

system requirements: macOS 14 and later

Fixes

  • Fix an issue in CotEditor 5.2.1 where the text color in the text fields within the Find window appears black in the dark mode.

Full Changelog: 5.2.1...5.2.2

5.2.1

system requirements: macOS 14 and later

Improvements

  • Update the CSS syntax to highlight more keywords (thanks to Karam!).
  • Update the JavaScript syntax to highlight placeholders in template literals.

Fixes

  • Fix an issue where the state of the Text Replacement option in modes is not saved.
  • Fix an issue where shortcuts could be assigned in the Key Bindings settings to menu commands that perform multiple replacements, even though these shortcuts didn’t actually work.
  • Fix an issue where the font in the input fields of the Find window would occasionally be replaced by a fallback font.
  • Fix an issue where the options button in the advanced character count doesn’t work.

Full Changelog: 5.2.0...5.2.1

(省略されました)