JSON ↔ YAML Converter — Free Online Converter
Convert between JSON and YAML formats
All processing happens locally. No data is sent to any server.
JSON (JavaScript Object Notation) and YAML (YAML Ain't Markup Language) are both popular data serialization formats. JSON is more compact and widely used in APIs, while YAML is more human-readable and commonly used in configuration files like Docker Compose, Kubernetes manifests, and CI/CD pipelines. Our converter handles bidirectional conversion between JSON and YAML. Paste your data in either format, select the conversion direction, and get the result instantly. The tool preserves data types, handles nested structures correctly, and outputs properly formatted results that are ready to use in your projects. Use the Swap button to convert the output back to the original format. You can also download the converted result as a file — useful for migrating configuration files between formats. The converter handles edge cases like empty arrays, null values, and deeply nested objects. The real-time preview shows you the result as you type, making it easy to verify the conversion is correct before copying or downloading. All processing happens in your browser — your data never leaves your device. This makes it safe to use with sensitive configuration files or proprietary data structures. For related data formatting, try our [JSON Formatter](/tools/json-formatter) to beautify JSON, or use our [SQL Formatter](/tools/sql-formatter) to format database queries.
FAQ
When should I use YAML over JSON?
YAML is more human-readable and supports comments, making it ideal for configuration files. JSON is more compact and widely supported in APIs and data exchange.
Are JSON and YAML interchangeable?
Nearly. YAML is a superset of JSON, so valid JSON is valid YAML. However, YAML supports additional features like comments and complex mapping keys that JSON doesn't.
Is my data safe?
Yes. All conversion happens in your browser. Your data never leaves your device.