What YAML versions are supported?

The formatter supports YAML 1.2, which covers all common features used in Kubernetes, Docker Compose, GitHub Actions, and Ansible.

Does it detect invalid YAML?

Yes. Parse errors are reported with the line and column number so you can locate and fix indentation and syntax issues immediately.

Does it change the meaning of my YAML?

No. Formatting only adjusts whitespace and normalises quoting. The semantic content of the document is preserved.

Format & Validate YAML Online Free

YAML's indentation-sensitive syntax makes formatting errors difficult to spot in large configuration files. A single misaligned key or inconsistent tab character can break a deployment pipeline, Kubernetes manifest, or CI configuration. This tool formats and validates any YAML document, normalising indentation and quoting, and reporting exact error locations when the input is invalid. Paste your YAML and get clean, consistently formatted output immediately. Everything runs in your browser, so private environment configs and secret-containing YAML files stay on your machine. This is useful for developers working with Kubernetes, Ansible, GitHub Actions, Docker Compose, and any other YAML-heavy tooling.

Indentation:

yaml input

lines

0 chars1 lines

formatted yamlREADY

lines

0 chars1 lines

FAQ

What YAML versions are supported?: The formatter supports YAML 1.2, which covers all common features used in Kubernetes, Docker Compose, GitHub Actions, and Ansible.
Does it detect invalid YAML?: Yes. Parse errors are reported with the line and column number so you can locate and fix indentation and syntax issues immediately.
Does it change the meaning of my YAML?: No. Formatting only adjusts whitespace and normalises quoting. The semantic content of the document is preserved.