Git Commit Linter — Conventional Commits & History Auditor
Validate git commit messages against the Conventional Commits specification. Paste one or more commits to check type, scope, and description format — errors and warnings shown per line with fix suggestions. Supports custom types and git log --oneline output.
How to Use Git Commit Linter — Conventional Commits & History Auditor
How to Use the Conventional Commit Linter:
Paste Your Commits: Type or paste one or more git commit messages into the input box — one per line. You can paste raw commits or the output of git log --oneline (the short hash prefix is automatically stripped).
Read the Summary: The four summary cards show total commits checked, valid count, invalid count, and warning count. A commit is "valid" if it has no errors; warnings are shown but do not fail validation.
Review Per-Commit Results: Each commit gets its own result card. Valid commits show a green tick; invalid ones show a red X. Click any card to expand it and see the full list of issues.
Understand Each Issue: Every issue shows its severity (Error or Warning), the rule name, a plain-language message explaining what is wrong, and a specific fix suggestion.
Add Custom Types: If your project uses non-standard types (e.g. infra, release, wip), expand the Custom types section and enter them as a comma-separated list. These types will not trigger the type-enum warning.
Load an Example: Click one of the three example buttons (All valid, With errors, Breaking changes) to populate the input with sample commits and see the linter in action.
Clear and Reset: Click Clear to empty the input and start fresh.
Common Use Cases:
- Pre-commit review: Check your commits before pushing or creating a pull request.
- Team onboarding: Show new team members what valid commit messages look like by loading the examples.
- CI/CD audit: Paste the output of git log --oneline from a branch to check all commits at once.
- Changelog generation: Ensure all commits follow the spec before running a changelog tool like standard-version or semantic-release.
- Hook configuration: Use the linter to understand the rules before setting up commitlint in your project.
Tips and Best Practices:
- The format is: type(scope)!: description — only type and description are required.
- Use the imperative mood in descriptions: "add feature" not "added feature" or "adds feature".
- Keep descriptions under 72 characters — longer subjects are harder to read in git log.
- Breaking changes should be marked with ! after the type/scope: feat!: remove deprecated API.
- The scope should be a single word or kebab-case noun identifying the area of change: feat(user-profile): ...
- Types are case-sensitive and must be lowercase: feat not Feat or FEAT.
- Do not end the description with a period.
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