What’s new in CotEditor 7.0 on Mac

Smarter syntax, sharper editing

More accurate highlighting, smarter commenting, and improved editor behavior, all powered by a redesigned syntax engine and definition format.

Powered by tree-sitter, where it matters most

Many major built-in syntaxes now use tree-sitter, a modern structure-based parser that enables deeper and more reliable language awareness.

Outline with depth

Icons make structure easier to scan, and tree-sitter–based syntaxes now support collapsible outlines that reflect hierarchy.