YAML Validator
Check Kubernetes manifests, CI configs, and app settings with this free YAML validator. Paste your document and click Validate to see whether the syntax is valid - errors include line and column so you can fix indentation issues fast.
YAML’s whitespace-significant syntax trips up even experienced engineers. This client-side checker never uploads your secrets-bearing config files. After validation, convert with YAML to JSON or pretty-print related JSON payloads next door.
Input
Paste or type your content here…
Output
Your result will appear here
Frequently Asked Questions
Why is indentation so important in YAML?
YAML uses indentation (not braces) to define structure. Mixing tabs and spaces or mis-aligning list items is the most common failure mode this validator catches.
Does validation execute any code?
No. We parse with js-yaml into data structures only. There is no code execution step.
Can I validate multi-document YAML?
Yes. Documents separated by --- are loaded with loadAll and summarized in the output.
How is this different from YAML to JSON?
The validator focuses on syntax success and error location. YAML to JSON is for conversion when you already have valid input.