Which YAML version is supported?

YAML 1.2 core behavior: block/flow styles, anchors, aliases, tags on scalars, and merge keys. Exotic directives beyond 1.2 may not parse.

Will huge files freeze my browser?

No. Documents above the inline threshold are parsed in a Web Worker with progress indication, and oversized inputs are rejected with a clear message instead of hanging.

YAML Formatter & Validator

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Inputs stay in browser memory. No external request is required for this operation, and zero data leaves your device.