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ToolNest AI
Free

JSON ↔ YAML Converter

Convert JSON to YAML and YAML to JSON with live validation, auto-detection and one-click export.

edit_noteInput
data_objectPaste JSON or YAML here
outputOutput
compare_arrowsConverted output appears here

About JSON ↔ YAML Converter

Paste JSON or YAML and instantly convert between formats in your browser. Auto-detects the input format, validates syntax in real time, and lets you pretty-print or minify the output. Download results as .json or .yaml files, copy to clipboard, and swap input and output with one click. All processing is 100% client-side — no data is ever sent to a server.

Frequently Asked Questions

JSON (JavaScript Object Notation) uses strict curly braces, brackets, and quoted keys — it is compact and universally supported. YAML (YAML Ain't Markup Language) is a superset of JSON with a more human-readable indentation-based syntax that supports comments and multiline strings.

Yes. The converter parses any valid JSON regardless of formatting and outputs clean, indented YAML.

Yes for the most common types: strings, numbers, booleans, nulls, arrays, and objects. Specialized YAML types like dates or binary data are converted to their string equivalents in JSON.

No. All conversion and validation happens entirely in your browser using js-yaml. Nothing is uploaded to any server — your data stays completely private.

Yes. The converter handles deeply nested objects, arrays, mixed types, and all standard JSON and YAML constructs.

Auto Detect tries to parse your input as JSON first. If that fails, it falls back to YAML parsing. The detected format is shown as a badge on the input panel.

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