How This Tool Converts JSON to YAML
- JSON objects become YAML mappings — each key-value pair is written as
key: valueon its own line. - JSON arrays become YAML sequences — each item is placed on its own line prefixed with
-. - Strings containing special YAML characters (
:#[{) are automatically double-quoted to keep the output valid. - Nested objects and arrays use 2-space indentation per level — the standard convention for YAML used in Docker Compose, Kubernetes, and GitHub Actions.
- Numbers, booleans (
true/false), andnullcarry over without quotes.
When to Use JSON to YAML
- When a Docker Compose file, Kubernetes manifest, or Helm chart values file requires YAML and you're starting from a JSON prototype or API response.
- When a CI/CD pipeline definition (GitHub Actions, GitLab CI, CircleCI) needs YAML input and your data is in JSON.
- When your application's config library reads YAML and you want to convert an existing JSON config without manually rewriting it.
Frequently Asked Questions
Does this tool preserve JSON data?
Yes. It converts JSON structure to YAML while keeping the same keys and values.
Can I convert nested arrays and objects?
Yes. Nested JSON objects are represented using YAML indentation for readability.
Can I move back to JSON?
Yes. Use the YAML to JSON Converter to reverse the conversion, or paste directly into the JSON Formatter.
Are strings automatically quoted in the output?
Only when necessary. Strings containing special YAML characters such as :, #, or [ are wrapped in double quotes automatically. Plain strings are output without quotes.
Does the YAML output use 2-space or 4-space indentation?
The output uses 2-space indentation, which is the most common convention for YAML files used in Docker Compose, Kubernetes, and GitHub Actions.