Vale is a linter for prose
A command-line tool that brings code-like linting to your writing. Enforce a consistent editorial style across every doc, in any format—entirely offline.
Why Vale
Linting built for the way you write
The precision of a code linter, applied to prose—so quality and consistency stop being a manual review step.
Private by design
Vale runs entirely offline. Your content is never sent to a remote server for processing or training.
Markup-aware
Understands Markdown, AsciiDoc, reStructuredText, HTML, and source code—linting prose while ignoring syntax.
Style guides included
Ready-made implementations of Microsoft, Google, and other popular style guides, plus community packages.
Fully customizable
Write your own rules in YAML—no plugins to compile. Match your brand voice and share rules across a team.
Fast, single binary
Built in Go with no runtime dependencies. Drop it into any editor, CI pipeline, or pre-commit hook.
Runs everywhere
One tool for macOS, Windows, and Linux—MIT-licensed, open source, and actively maintained.
One tool, every app
More than just a command-line interface.
Vale integrates with many popular apps, browsers, and platforms—including VS Code, Google Chrome, GitHub Actions, and more.
Supported by a community
Sponsors & backers
Vale is free and open source, sustained by the generous organizations and individuals who back it on Open Collective.
