JSON to YAML

Overview

• Converts JSON-formatted data into YAML format.
• YAML expresses hierarchical structure through indentation and is easy for humans to read and write, and is widely used in configuration files such as Docker Compose, Kubernetes, and GitHub Actions.
• Since JSON can be interpreted as valid YAML notation, converting it does not change the meaning of the data, only its notation.

Usage

1. Enter the JSON you want to convert into the text area.
2. Click the "Convert" button.
3. The result, converted to YAML format, is displayed below. Use the "Copy" button to copy it to the clipboard.

Example

{"name":"Taro","age":20,"hobbies":["reading","coding"]}

name: Taro
age: 20
hobbies:
  - reading
  - coding

Use Cases

• Quickly creating configuration files that require YAML, such as Docker Compose or Kubernetes manifests, starting from JSON
• Transcribing an API response (JSON) into YAML for documentation or sample material
• Assembling a YAML-managed configuration such as a GitHub Actions workflow in JSON and then converting it

FAQ

Notes

• The key order in the result preserves the property order of the input JSON as-is.
• Since JSON cannot contain comments, the resulting YAML will not include any comments either. Add them manually after conversion if needed.
• Converting very large JSON data (several MB or more) may make browser processing slow.