YAML Formatter
Format and validate YAML locally in your browser with js-yaml.
Format and validate YAML in your browser. Nothing is uploaded.
Output
About the YAML Formatter
YAML is common in Docker Compose, CI pipelines, Ansible, and Kubernetes manifests. This formatter parses and pretty-prints YAML in your browser so indentation mistakes show up before deploy.
How to use
- Paste your YAML.
- Click Format to rewrite it cleanly, or Validate only to check syntax.
- Copy the output back into your repo.
Common mistakes
- Tabs instead of spaces
- Missing space after
: - Incorrect nesting under lists
Secrets in YAML should stay local — this page does not upload your content.