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YAML Validator & Formatter Online Free

Validate and format YAML documents and detect syntax errors instantly.

rule YAML Validator & Formatter Online Free
verified_user Your files are processed only as needed and are not stored after the tool finishes.
YAML is the standard format for configuration files in Kubernetes, Docker Compose, GitHub Actions, Ansible, and many other DevOps tools. A single indentation error can break a pipeline or deployment. Our free YAML validator instantly checks your YAML for syntax errors and shows clear error messages with line numbers. Paste your configuration and get immediate feedback before committing.

Frequently Asked Questions

Does YAML formatting matter? expand_more
Yes. YAML uses whitespace and indentation for structure, so incorrect indentation causes parse errors. Two-space indentation is the universal convention.
Can I convert YAML to JSON? expand_more
Not directly in this tool, but use our JSON to YAML converter which also supports converting YAML back to JSON.

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