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RedPen

On the record

API and UI
The project README links to a REST API and user interface.github.com · read 8 Oct 2026
Audience
RedPen is described as a tool for writers or programmers producing technical documents or manuals that must follow a writing standard.redpen.cc · read 8 Oct 2026
Command-line and CI
A maker blog describes running RedPen from the command line in a Travis CI workflow to check document quality.blog.redpen.cc · read 8 Oct 2026
Customization
Users can choose validators and add them to a configuration file.redpen.cc · read 8 Oct 2026
Document formats
It validates markup text including Markdown, Textile, AsciiDoc, reStructuredText, and LaTeX.redpen.cc · read 8 Oct 2026
Extensions
The project supports a plugin system that lets users write extensions with JavaScript.github.com · read 8 Oct 2026
External validation
The WordPress plugin blog says it uses a public RedPen server by default and can be configured to use the user's own RedPen Server instance.blog.redpen.cc · read 8 Oct 2026
Formats
The site lists Markdown, Textile, AsciiDoc, reStructuredText, and LaTeX as supported markup formats.redpen.cc · read 8 Oct 2026
Integrations
The project lists integrations or packages for Atom, Emacs, Vim, WordPress, IntelliJ IDEA, Sublime Text, and Visual Studio Code.github.com · read 8 Oct 2026
JetBrains integration
The RedPen IntelliJ IDEA plugin adds text validation as an editor inspection and supports plain text, properties and resource bundles, Markdown, and AsciiDoc when relevant plugins are installed.blog.redpen.cc · read 8 Oct 2026
Languages
The maker says RedPen works with documents in languages including English, German, Japanese, and Chinese.redpen.cc · read 8 Oct 2026
License
The project repository identifies its license as Apache-2.0.github.com · read 8 Oct 2026
Natural-language checking
It automates checks on documents written in natural languages, rather than programming languages.redpen.cc · read 8 Oct 2026
Purpose
RedPen is a proofreading tool for writers and programmers who write technical documents or manuals that must follow a writing standard.redpen.cc · read 8 Oct 2026
REST API
The RedPen Server provides REST endpoints for validating documents with preset or user-supplied configuration.blog.redpen.cc · read 8 Oct 2026
Support
The project lists documentation, a mailing list, and English and Japanese chat rooms for support.github.com · read 8 Oct 2026
WordPress integration
The RedPen WordPress plugin validates posts while users type and can highlight errors in the editor.blog.redpen.cc · read 8 Oct 2026

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