About this tool
YAML is a human-friendly data format used for configuration, CI pipelines and Kubernetes manifests, but its indentation-sensitive syntax makes errors easy to introduce. This validator parses your YAML and, if anything is wrong, reports the precise line and column so you can fix it fast.
Valid input is also converted to JSON in a side pane, which is handy for feeding YAML config into tools that expect JSON. Multi-document files separated by --- are supported and returned as an array. Paste your YAML and the result updates as you type.
Validation and conversion happen locally — your config never leaves your browser.
Frequently asked questions
What kinds of errors does it catch?
Syntax errors such as bad indentation, mismatched brackets, invalid anchors and duplicate keys — each reported with a line and column. It validates structure, not whether your config is semantically correct for a given tool.
Does it handle multi-document YAML?
Yes. Documents separated by --- are each parsed; the JSON output is an array with one entry per document.
How does this differ from the JSON ⇄ YAML converter?
This tool focuses on validation with precise error positions. The JSON ⇄ YAML converter is for two-way conversion when you already have valid input; the two are cross-linked.