YAML formatter/validator · Guide
How to Format YAML Online
Formatting YAML is quick, and the validation it performs along the way is the real benefit.
Paste and validate
Drop the YAML in. If it is invalid, the error points at the line where parsing failed — usually an indentation or quoting problem.
Read the normalised output
Valid YAML is re-emitted with consistent indentation. Use the tidy version in your config so structure is unambiguous.
Frequently asked questions
Can I use this for production work?
Yes, for inspection, formatting and quick generation. Still review the output before committing it to production code or configuration.
Ready to try it?
Open the free browser-based YAML formatter/validator and apply what you just read — no sign-up, runs locally.
Open the YAML formatter/validator tool