Format and validate YAML, or convert between YAML and JSON. Parse errors surface with line numbers,
and the YAML 1.1 schema is used (so yes/no/on/off are booleans unless quoted). All work happens
in your browser.
YAML or JSON for config?
YAML wins for human-edited config (comments, less noise). JSON wins for machine-to-machine. Many tools accept both.
"Norway Problem"?
YAML 1.1 parses NO as false — quote it as "NO" to keep it a string. YAML 1.2's core schema fixes this; many tools still default to 1.1.
Is my data uploaded?
No. Parsing happens in your browser via js-yaml.