Need more than a rule playground?

Explore Vale CMS
Open source · MIT licensed · 5.6K

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.

bash — vale
$ vale README.md
README.md
4:3 error Did you really mean 'existant'? Vale.Spelling
6:12 warning Use 'use' instead of 'utilize'. Microsoft.Vocab
9:1 suggestion In general, use active voice. write-good.Passive
1 error, 1 warning and 1 suggestion in 1 file.

Shipping in the documentation pipelines of

  • Microsoft
  • Amazon Web Services
  • NVIDIA
  • Texas Instruments
  • GitLab
  • Red Hat
  • Grafana Labs
  • Datadog
  • Docker
  • Spectro Cloud

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.

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.

App screenshot

Adopters

Teams running Vale

Every entry links to a public .vale.ini, style package, or write-up.

58 teams shown

Infrastructure

Special thanks to

GitBook

hosts docs.vale.sh

Community plan

Ready to start linting?
Install now.