CodeMirror

Spec sheet

What it does

CodeMirror is a code editor component for websites, with an API for extending it.Read 11 Oct 2026 · codemirror.net

Supported platforms

webRead 20 Sep 2026 · github.com

Support

The site directs questions to its forum and bug reports to its issue tracker; it does not list support response times or a current support price.Read 11 Oct 2026 · codemirror.net

Maker

The site says CodeMirror is developed on code.haverbeke.berlin and identifies Marijn Haverbeke as its maintainer on an older project page.Read 11 Oct 2026 · codemirror.net

Accessibility and mobile

The site says CodeMirror works with screen readers and keyboard-only users, and uses native selection and editing features on phones.Read 11 Oct 2026 · codemirror.net

Editing features

Features include syntax highlighting, line numbers, autocompletion, code folding, search and replace, linting, and multiple selections.Read 11 Oct 2026 · codemirror.net

Extensibility

The reference manual describes CodeMirror as a set of npm packages under the @codemirror scope, with features such as highlighting and undo history added through extensions.Read 11 Oct 2026 · codemirror.net

Extension support

YesRead 20 Sep 2026 · github.com

Language server support

YesRead 20 Sep 2026 · github.com

Language support

The site lists parser packages for languages including JavaScript, Python, Rust, SQL, HTML, CSS, and JSON.Read 11 Oct 2026 · codemirror.net

License and commercial use

The site describes CodeMirror as MIT-licensed and says commercial users are socially, but not legally, expected to help fund maintenance.Read 11 Oct 2026 · codemirror.net

Security-related capability

The reference manual documents an option to provide a Content Security Policy nonce for editor style sheets.Read 11 Oct 2026 · codemirror.net

Plans and prices

Every CodeMirror plan and price →

Where Specifiction places it

• Code editors#39 of 457.6