JSON to YAML Converter

Convert JSON data to YAML format. Perfect for generating config files for Kubernetes, Docker Compose, and more.

JSON Input

YAML Output

About This Tool

YAML (YAML Ain't Markup Language) is a human-friendly data serialization format widely used for configuration files in tools like Docker Compose, Kubernetes, Ansible, GitHub Actions, and many more. While JSON is the standard for APIs, YAML is preferred for configuration because of its readability — no curly braces, no commas, and support for comments.

Converting JSON to YAML is useful when migrating configuration between systems, making API responses human-readable for documentation, or preparing data for DevOps tools. The conversion is straightforward since YAML is a superset of JSON — every valid JSON document is also valid YAML.

Key differences include YAML's use of indentation for nesting (rather than braces), its support for comments (lines starting with #), and its more relaxed string quoting rules. This tool uses the industry-standard js-yaml library for accurate conversion.

Frequently Asked Questions

What YAML style is used?

The output uses block style (the most human-readable YAML format) with 2-space indentation, which is the standard for most configuration files.

Are JSON comments preserved?

Standard JSON does not support comments. If your input uses non-standard comments (e.g., JSONC), they will cause a parse error. Remove comments before converting.

How are special values handled?

null becomes ~ or null in YAML. Booleans, numbers, and strings are all properly typed. Date-like strings are kept as strings.

Can I convert back from YAML to JSON?

Yes! Use our YAML to JSON tool for the reverse conversion.