CotEditor is a light-weight, neat, yet powerful text editor designed for editing plain-text files such as web pages (HTML, CSS), program source codes (Python, Ruby, Perl, etc.), structured texts (Markdown, Textile, TeX, etc.), or any other kind of plain-text. Just For Mac The application is exactly made for macOS.

CotEditor looks and behaves just as macOS applications should. It means, you already know how to use it even on the first launch.

There are no complex configuration files that require geek knowledge so that you can access all your settings including syntax definitions and themes from a standard preferences window. Quick, Easy, and Powerful CotEditor launches so quick that you can write your text immediately when you want to. It's perfect for you to write a draft version of your document or a scratch code. The simply organized user interface doesn't disturb your task. However, at the same time, CotEditor is neither a software only for beginners nor a typical minimal “zen-style” editor. It is fully customizable. There are, of course, syntax highlighting feature for various languages, find and replace with the regular expression, auto-indentation, command-line tool, and lots of other deep functions.

You can also easily write your own macro in your favorite languages. Improvements - Change not to highlight occurrences of the selection when there are more than 100. Update validation pane in the syntax style editor. Fixes - Fix an issue where `cot` command failed to open paths or stdin containing backslash character.

Fix an issue on CotEditor 3.6.5 where right-click no longer opens the context menu under macOS 10.13 and earlier. Fix an issue where the thickness of the line numbers view did not grow enough with a large number of lines. Fix an issue where the syntax style validator ignored unbalanced block comment delimiters that should be an error. Fix the preferences pane switching animation under macOS 10.13 and earlier.

Fix possible crashes. Fix minor issues in the syntax style editor. Fix some localized strings. 3.6.6 19 Nov 2018. Fixes - Fix an issue on CotEditor 3.6.5 where the syntax - Fix an issue where preferences panes could not changed under macOS 10.12. Add missing localizations. Highlight did not update while typing.

What's New in CotEditor 3.6.5 New Features - New option for cursor style (Customize the behavior in Appearances preference pane). Improvements - Avoid drawing variant sequence as invisible control characters.

Coteditor 3.1.4 Download For Mac Pc

Make line number view opaque if lines are unwrapped on macOS 10.14 to avoid drawing the editor's text over the line numbers. Revoke the line counting behavior change with VoiceOver in CotEditor 3.6.3. Fixes - Fix an issue where the editor area could still tuck under the line number view. Fix an issue where the line number of the last empty line disappeared when lines are not wrapped and scrolled. 3.6.5 18 Nov 2018. New Features - New option for cursor style (Customize the behavior in Appearances preference pane).

Improvements - Avoid drawing variant sequence as invisible control characters. Make line number view opaque if lines are unwrapped on macOS 10.14 to avoid drawing the editor's text over the line numbers. Revoke the line counting behavior change with VoiceOver in CotEditor 3.6.3. Fixes - Fix an issue where the editor area could still tuck under the line number view. Fix an issue where the line number of the last empty line disappeared when lines are not wrapped and scrolled.

3.6.4 9 Nov 2018. Improvements - Assign `Command+Shift+` shortcut to “Show Next Tab” command instead of “Surround Selection with Brackets” command. Treat a logical line, which is delimited by line ending characters, as one line in VoiceOver, instead of a visual (wrapped) line. Thereby, users can now also know the current line number by pressing VoiceOver shortcut VO+F3. Improve the accessibility of user interface elements with VoiceOver. Avoid performing custom sort with an invalid parameter.

Display default setting values as the input field's placeholder in preferences window when empty. Fixes - Fix an issue where selected inspector pane was not stored. Fix an issue where initial display area shifted unwantedly if line numbers are displayed lines are unwrapped. Fix an issue where script name was not displayed in Console.

Fix an issue where the writing direction (RtL) was not delivered to printing. Fix layout in some localized environment. 3.6.2 13 Oct 2018. New Features - Let the input fields in the find panel accept pinch-zoom. Improvements - Avoid selecting deleted spaces when undoing a soft tab deletion. Make the credits view in About panel dark in the Dark Mode.

Add “.cxx” extension to “C” syntax style. Adjust the width of line number views. Fixes - Fix an issue where the cursor position did not restore correctly after repeatedly undoing & redoing bracket insertion with the “Automatically insert closing brackets and quotes” option enabled. Fix an issue where editor scrolled unwantedly after pasting something at a latter half part of the document with “Link URLs in document” option enabled. Fix an issue where URL link ranges expanded even if non-URL-related lines is pasted just after an URL.

Fix an issue where the application could rarely crash under specific conditions. 3.6.1 4 Oct 2018. New Features - Add “Match only whole word” option to advanced find options (Default: off). Add syntax style for “Properties” (mainly for Java). Improvements - Enable the enhanced runtime protection on macOS 10.14 Mojave also by the MAS version.

Make the i-beam cursor more legible in a dark background theme. Sync sidebar width among tabbed windows. Fixes - Fix an issue where the initial window size could be easily forgotten.

Fix an issue `cot` command failed if the client terminal is non-scriptable. Fix an issue where the application could rarely crash on reopening documents under specific conditions. Fix the tab window switching via a shortcut key in macOS 10.14. 3.6.0 24 Sep 2018. New Features - Support Dark Mode in macOS 10.14 Mojave. Add a new theme “Dendrobates (Dark)”.

Add new commands to transform selections to snake case, camel case, or pascal case. Add “Emoji & Symbols” toolbar item. Add an option to select the default writing direction among left-to-right, right-to-left, and vertical (Customize in Window preferences pane). Improvements - Change the system requirement to macOS 10.12.2 Sierra and later. Update `cot` command-line tool to return the focus to the client terminal window again after `-wait`. Abandon the ancient ODB editor support. Fixes - Fix an issue where theme was not applied to document print when the print theme setting is “Same as Document's Setting”.

Fix an issue where “Copy as Rich Text” command lost the style information when paste to some specific applications, such as Pages. Fix an issue where the current line highlight could blink while pinch zoom. 3.5.4 17 Sep 2018. Fixes - Fix an issue where the “Replace All” command didn't work on CotEditor 3.5.2. What's New in Version 3.5.2 Improvements - Avoid editor can be edited while a dialog covers it. Update YAML syntax style for more reliable highlight.

Update Swift syntax style by fixing outline extraction. Fixes - Fix an issue where the multi replacement feature exported definitions without its file extension.

Fix an issue where “Hide extension” checkbox in the setting export dialog was ignored. Fix an issue where an unhidable empty progress dialog was displayed if another dialog was displayed when the task started. Address an issue where the application could rarely crash during syntax highlighting. 3.5.2 6 Sep 2018. Improvements - Avoid editor can be edited while a dialog covers it. Update YAML syntax style for more reliable highlight.

Update Swift syntax style by fixing outline extraction. Fixes - Fix an issue where the multi replacement feature exported definitions without its file extension. Fix an issue where “Hide extension” checkbox in the setting export dialog was ignored.

Fix an issue where an unhidable empty progress dialog was displayed if another dialog was displayed when the task started. Address an issue where the application could rarely crash during syntax highlighting. 3.5.1 27 Aug 2018. New Features - New toolbar icons. Highlight the same substrings of the selection automatically (Customize the behavior in General preferences pane).

New option to allow overscrolling (Customize the behavior in Window preferences pane). Enable to change the tab width of a specific document to a desired number. Let the input fields in the find panel accept text scaling commands, such as “Bigger”, “Smaller” and “Reset to Default”. Improvements - Add command “Select All Find Matches” in Find menu. Improve the editor's scrolling behavior to scroll along the predominant axis. Add menu item to toggle the visibility of the sidebar inspector. Remove some setting options for windows such as window size and visibilities of document inspector and status bar from Window preferences pane.

From now on, the latest change to a window will be inherited to future windows just like other standard Cocoa applications. Remove “length” display in the status bar. Remove feature to change only the frontmost editor's opacity temporary.

From this, `view opacity` property on AppleScript is also deprecated. Keep the cursor position as possible after the editor content is updated to the latest version modified by another process. Display current user's system-wide setting for window tabbing in the menu on the Window pane.

Optimize the performance of character counting. Improve general stability of the print operation. Optimize auto URL detection with paste to a large document. Update Python syntax style for Python 3.7. Update Swift syntax style for Swift 4.2 and some improvements. Fixes - Fix an unlocalized text. 3.4.4 7 Jul 2018.

Improvements - Copy also the executability from the file permission of the original document when duplicating a document. Fixes - Fix an issue under OS X 10.11 where the application could crash when an item in the outline inspector is clicked. Fix an issue where the word completion of which word starts with double underscores (e.g. init) skipped the second underscores. Fix an issue where the application could rarely crash while typing.

Fix an issue where the options for the software updater for non-AppStore versions were wrongly displayed in the General preferences pane. 3.4.0 14 May 2018. New Features - Replace matches with preset replacement definition (Find Multiple Replace). Add outline menu to side bar. Select tabbed window with Cmd+number. Parse regular expression pattern in find string field in regular expression mode: - Syntax highlight. Highlight matching brace by moving cursor.

Select the range surrounded by a brace pair by double-clicking a brace. Add a new theme “Resinifictrix”. Improvements - Give haptic feedback on pinch zoom when the scale becomes 100%. Adjust background color for selected range in inactive editor to avoid unreadable text, especially by a dark theme. Make the current line highlight semi-transparent if editor opacity is not 100%.

Ignore brackets escaped with on bracket pair highlight. Restore selected inspector pane on window restoration. Move “Get Info” and “Show Incompatible Characters” menu items into newly added View Inspector submenu. Update highlight style of icons in the side inspector.

Enable importing multiple syntax/theme setting files at once. Import syntax style files via drag and drop to the Installed Syntax Styles area. Avoid merging multiple separators next to each other in the navigation menu into a single separator. Delete the feature alerting inconsistent encoding declaration in document on saving. Remove Cmd+1 shortcut for Console from default key-binding settings. Avoid switching to inactive tabbed window only to show a syntax highlighting indicator. Remove the workaround for the issue of editor scrolling on early macOS High Sierra that was introduced on CotEditor 3.2.4.

Optimize syntax highlighting performance. Update “Java” syntax style by adding term var. Fixes - Fix a possible crash with continuous find/replacement.

Fix an issue where the font settings cannot be changed on macOS 10.12. Fix an issue where the cursor position did not follow the line when Move Up command was performed at the end of the document. Fix an issue where the find result in the input field of the find panel did not clear when a new find string was set from the find history menu. Fix an issue where the sidebar inspector did close inward when the pane was switched after opening the sidebar outward. Fix an issue where snippet keybindings could not be restored to the default correctly. Fix an issue where progress spinner for outline menu displayed unwantedly on document opening.

3.3.5 9 Mar 2018. Improvements - When “Indent with Tab key” is on, reduce indent level of the current line with Shift+Tab even when nothing is selected.

Fixes - Fix an issue where lossy saving was failed. Fix an issue where `Cmd+Left` was ignored when the cursor locates at the end of the document. Fix an issue where save dialog layout corrupted when toggling the visibility of the file browser. Fix an issue where no alert was raised on saving even when a document contains lossy yen signs.

Fix an issue where document syntax was parsed​ twice on file open. Fix a possible crash on print. 3.3.3 24 Feb 2018. New Features - Add an option “Indent with Tab key” to the Edit pane in preferences. Improvements - Change the behavior of “Cmd+Left” key so that the cursor moves first to the beginning of the visual lines, then to the column right after indentation, and finally to the beginning of the line. Remove “Open Hidden” command (Use “Show hidden files” option in the open dialog instead). Display an open dialog on launch if so set even when iCloud storage is disabled.

Improve stability on text encoding change. Refine dialog messages on text encoding change. Change sidebar behavior to close inward when it was opened inward because of insufficient space. Avoid requiring high power GPU use. Fixes - Fix a long-standing issue where incompatible characters could not be detected when the length of converted document text is changed. Fix an issue where key-binding setting field sometimes ignored user input. Fix an issue where wrong file creation date and file permission could be displayed in the document inspector.

Fix an issue where document files did not forget vertical orientation state when once set before. Fix an issue where the encoding selected in the open dialog last time was unwantedly applied to the newly opened document when a document opened with the open dialog previously had already opened. Fix an issue where menu item title for “Horizontal” (in Format Writing Direction) was displayed as “Vertical” in Japanese localization. 3.3.2 11 Feb 2018. Fixes - Fix an issue on CotEditor 3.3.1 where the ​application could crash on window close. Fix an issue where application crashed when performing “Find All” with the regular expression and without grouping.

What's New in CotEditor 3.3.0 New Features - iCloud document. Open a document in the existing Untitled window that was created automatically on an open/reopen event, if exists. New feature “Sort by pattern,” which enables sort selected lines by specific column or fully freely using the regular expression. Add new setting option “Reopen windows from the last session on launch” in General pane.

Add new setting option “including whitespace-only lines” for “trim trailing whitespace” command in General pane. Introduce “Right to Left” writing direction by changing the direction from Format Writing Direction menu. More integrated Share feature: - Share documents with other people through iCloud drive with “Add People” command in the File Share menu. Enable sharing a document that has not been saved yet. Remove the feature that shares document content text from the File menu (You can still share selected text from the context menu). Other small improvements. Add new commands “Half-width to Full-width” and “Full-width to Half-width” to Text Transformations menu.

Add Portuguese localization (thanks to BR Lingo!). Add the following encodings to the encoding list (To activate new encodings, restore default once in Preferences Format Edit List.): - Thai (Windows, DOS) - Thai (ISO 8859-11) Improvements - Change the system requirement to OS X 10.11 El Capitan and later. Add clear button to the input fields in the find panel. Gather the “open a new document” “on launch” and “when CotEditor becomes active” options and create new “When nothing else is open:” option.

Enable “shift right” and “shift left” commands to process multiple selections. Scroll console view after getting a new message to make it visible. Display sharing window within the target document window. Swap position of “View” with “Format” menu to conform to the Apple's Human Interface Guidelines. Move the menu item changing the text orientation into Format Writing Direction.

Display full encoding name in the status bar instead of the IANA charset name. Add tooltips to the Unicode normalization forms in Text menu. Append “Option-Command-T” shortcut to “Show/Hide Toolbar” menu item. Remove “Color Code Panel” command from the “Window” menu (use “Edit Color Code” command in “Text” menu instead).

Remove “share find text with other applications” option. Restore the last viewed preference pane when Preferences is opened. Add an input field for the editor opacity setting. Adjust scroll after toggling line wrap.

Add scroll margin to the right side of find panel fields dynamically, so that entire inputs can be seen even when find/replacement result is shown. Update Python syntax style to fix highlight of string and bytes literals.

Tweak acknowledgments window design. Update Help contents style. Some minor UI improvements and fixes.

Update Japanese localization to conform with the modern macOS localization rules. Fixes - Fix an issue where the word suggestion in the Touch Bar cannot insert a word starts with a symbol correctly, and, therefore, a workaround was added on CotEditor 3.2.3. Fix an issue where character inspector could expand vertically too much with some specific characters. Fix an issue where invisible symbols for control characters were not drawn in input fields in find panel. Fix scroll position in the help viewer on jumping to a help page from CotEditor. Fix some unlocalized text. 3.3.1 11 Feb 2018.

Fixes - Fix an issue where the application crashed on launch under specific conditions. Fix an issue where the iCloud storage was not enabled. Fix arrows in the navigation bar on the vertical text mode. What's New in CotEditor 3.3.0 New Features - iCloud document. Open a document in the existing Untitled window that was created automatically on an open/reopen event, if exists.

New feature “Sort by pattern,” which enables sort selected lines by specific column or fully freely using the regular expression. Add new setting option “Reopen windows from the last session on launch” in General pane. Add new setting option “including whitespace-only lines” for “trim trailing whitespace” command in General pane. Introduce “Right to Left” writing direction by changing the direction from Format Writing Direction menu. More integrated Share feature: - Share documents with other people through iCloud drive with “Add People” command in the File Share menu. Enable sharing a document that has not been saved yet. Remove the feature that shares document content text from the File menu (You can still share selected text from the context menu).

Other small improvements. Add new commands “Half-width to Full-width” and “Full-width to Half-width” to Text Transformations menu. Add Portuguese localization (thanks to BR Lingo!).

Add the following encodings to the encoding list (To activate new encodings, restore default once in Preferences Format Edit List.): - Thai (Windows, DOS) - Thai (ISO 8859-11) Improvements - Change the system requirement to OS X 10.11 El Capitan and later. Add clear button to the input fields in the find panel. Gather the “open a new document” “on launch” and “when CotEditor becomes active” options and create new “When nothing else is open:” option. Enable “shift right” and “shift left” commands to process multiple selections. Scroll console view after getting a new message to make it visible.

Display sharing window within the target document window. Swap position of “View” with “Format” menu to conform to the Apple's Human Interface Guidelines. Move the menu item changing the text orientation into Format Writing Direction. Display full encoding name in the status bar instead of the IANA charset name.

Add tooltips to the Unicode normalization forms in Text menu. Append “Option-Command-T” shortcut to “Show/Hide Toolbar” menu item. Remove “Color Code Panel” command from the “Window” menu (use “Edit Color Code” command in “Text” menu instead). Remove “share find text with other applications” option. Restore the last viewed preference pane when Preferences is opened.

Add an input field for the editor opacity setting. Adjust scroll after toggling line wrap. Add scroll margin to the right side of find panel fields dynamically, so that entire inputs can be seen even when find/replacement result is shown. Update Python syntax style to fix highlight of string and bytes literals. Tweak acknowledgments window design. Update Help contents style. Some minor UI improvements and fixes.

Update Japanese localization to conform with the modern macOS localization rules. Fixes - Fix an issue where the word suggestion in the Touch Bar cannot insert a word starts with a symbol correctly, and, therefore, a workaround was added on CotEditor 3.2.3.

Fix an issue where character inspector could expand vertically too much with some specific characters. Fix an issue where invisible symbols for control characters were not drawn in input fields in find panel. Fix scroll position in the help viewer on jumping to a help page from CotEditor. Fix some unlocalized text. 3.3.0 8 Feb 2018.

New Features - iCloud document. Open a document in the existing Untitled window that was created automatically on an open/reopen event, if exists.

New feature “Sort by pattern,” which enables sort selected lines by specific column or fully freely using the regular expression. Add new setting option “Reopen windows from the last session on launch” in General pane. Add new setting option “including whitespace-only lines” for “trim trailing whitespace” command in General pane. Introduce “Right to Left” writing direction by changing the direction from Format Writing Direction menu. More integrated Share feature: - Share documents with other people through iCloud drive with “Add People” command in the File Share menu.

Enable sharing a document that has not been saved yet. Remove the feature that shares document content text from the File menu (You can still share selected text from the context menu). Other small improvements.

Add new commands “Half-width to Full-width” and “Full-width to Half-width” to Text Transformations menu. Add Portuguese localization (thanks to BR Lingo!). Add the following encodings to the encoding list (To activate new encodings, restore default once in Preferences Format Edit List.): - Thai (Windows, DOS) - Thai (ISO 8859-11) Improvements - Change the system requirement to OS X 10.11 El Capitan and later. Add clear button to the input fields in the find panel.

Gather the “open a new document” “on launch” and “when CotEditor becomes active” options and create new “When nothing else is open:” option. Enable “shift right” and “shift left” commands to process multiple selections. Scroll console view after getting a new message to make it visible. Display sharing window within the target document window.

Swap position of “View” with “Format” menu to conform to the Apple's Human Interface Guidelines. Move the menu item changing the text orientation into Format Writing Direction. Display full encoding name in the status bar instead of the IANA charset name.

Add tooltips to the Unicode normalization forms in Text menu. Append “Option-Command-T” shortcut to “Show/Hide Toolbar” menu item.

Remove “Color Code Panel” command from the “Window” menu (use “Edit Color Code” command in “Text” menu instead). Remove “share find text with other applications” option.

Restore the last viewed preference pane when Preferences is opened. Add an input field for the editor opacity setting. Adjust scroll after toggling line wrap. Add scroll margin to the right side of find panel fields dynamically, so that entire inputs can be seen even when find/replacement result is shown. Update Python syntax style to fix highlight of string and bytes literals. Tweak acknowledgments window design. Update Help contents style.

Some minor UI improvements and fixes. Update Japanese localization to conform with the modern macOS localization rules. Fixes - Fix an issue where the word suggestion in the Touch Bar cannot insert a word starts with a symbol correctly, and, therefore, a workaround was added on CotEditor 3.2.3.

Fix an issue where character inspector could expand vertically too much with some specific characters. Fix an issue where invisible symbols for control characters were not drawn in input fields in find panel. Fix scroll position in the help viewer on jumping to a help page from CotEditor. Fix some unlocalized text. 3.2.8 21 Jan 2018. Improvements - Change not to highlight occurrences of the selection when there are more than 100. Update validation pane in the syntax style editor.

Fixes - Fix an issue where `cot` command failed to open paths or stdin containing backslash character. Fix an issue on CotEditor 3.6.5 where right-click no longer opens the context menu under macOS 10.13 and earlier. Fix an issue where the thickness of the line numbers view did not grow enough with a large number of lines. Fix an issue where the syntax style validator ignored unbalanced block comment delimiters that should be an error.

Fix the preferences pane switching animation under macOS 10.13 and earlier. Fix possible crashes. Fix minor issues in the syntax style editor.

Fix some localized strings.