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CODEOWNERS generator and validator

Edit your CODEOWNERS rules, get instant validation of owners and patterns, and test any file path to see who GitHub would request a review from.

Valid: 7 rules, no problems found.

infra/prod/network.tf is owned by @acme/platform (line 10: /infra/**/*.tf).

Normalized file

# Default owners for everything
* @acme/engineering

# Frontend
/web/ @acme/frontend
*.css @acme/design

# Backend and infrastructure
/api/ @acme/backend @alice
/infra/**/*.tf @acme/platform
/docs/ docs@acme.dev

# CI changes need platform review
/.github/workflows/ @acme/platform

Everything runs in your browser; nothing you type is sent anywhere.

How to use it

  1. Write or paste your CODEOWNERS rules. Each line is a file pattern followed by one or more owners.
  2. Fix any errors in the validation list, such as invalid owner names or unsupported pattern syntax.
  3. Enter a file path to test. The last matching rule wins, so put general rules first and specific ones after.

Frequently asked questions

Where does the CODEOWNERS file go?

In .github/, the repository root or docs/. GitHub uses the first one it finds in that order.

Which rule wins when several match?

The last matching pattern in the file takes precedence, so order rules from general to specific.

Who can be an owner?

A GitHub username (@alice), a team (@org/team) or an email address tied to a GitHub account. Owners need write access to the repository.

What patterns are not supported?

Negation with !, character ranges in [ ] and escaping with #. Most other gitignore syntax works, including * and **.

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