JSON to YAML Converter - Free Online JSON to YAML Tool
Convert JSON to YAML format online for free. Fast, accurate JSON to YAML converter with syntax validation. No signup required.
What is JSON to YAML Converter?
How to Use JSON to YAML Converter
Paste your JSON into the left input field. The YAML output appears automatically in the right panel. If your JSON has syntax errors, you will see an error message indicating the issue. Click "Copy" to copy the YAML result to your clipboard. You can also convert YAML back to JSON by switching the mode. Use the "Format JSON" button to pretty-print your input first if needed.
How JSON to YAML Converter Works
Common Use Cases
- Converting API response JSON to YAML format for Kubernetes ConfigMaps or Secrets
- Transforming JSON configuration into YAML for Docker Compose files
- Converting JSON data to YAML for Ansible playbooks and variables
- Migrating configuration from JSON format to YAML for GitHub Actions workflows
- Preparing YAML fixtures from JSON API data for testing and documentation
- Converting JSON schemas to YAML for OpenAPI/Swagger specification files
Frequently Asked Questions
Is JSON valid YAML?▼
Yes, technically every valid JSON document is also valid YAML (since YAML 1.2). However, YAML offers additional features like comments, anchors/aliases, and multi-line strings that JSON does not support. This tool converts JSON into idiomatic YAML format with proper indentation for better readability.
What is the difference between JSON and YAML?▼
JSON uses braces, brackets, and mandatory quoting with no comment support. YAML uses indentation-based structure, supports comments (#), multi-line strings, and anchors. YAML is generally more readable for configuration files, while JSON is more common in APIs and data interchange due to its strict, unambiguous syntax.
Can YAML handle all JSON data types?▼
Yes. YAML supports all JSON data types: strings, numbers, booleans (true/false), null, objects (mappings), and arrays (sequences). YAML also adds features not in JSON like timestamps, binary data, and ordered mappings.
Why convert JSON to YAML?▼
Many DevOps tools prefer YAML: Docker Compose, Kubernetes, GitHub Actions, Ansible, and more use YAML for configuration. If you have data in JSON format (from an API or another tool), converting to YAML lets you use it directly in these systems without manual reformatting.
Does the converter preserve data accuracy?▼
Yes. The conversion is lossless for all standard JSON data types. Numbers, strings, booleans, null values, nested objects, and arrays are all preserved exactly. The only change is the formatting syntax from JSON to YAML notation.
Is .yml the same as .yaml?▼
Yes, .yml and .yaml are interchangeable file extensions for YAML files. There is no difference in format or functionality. The official YAML specification recommends .yaml, but .yml is widely used as a shorter alternative, especially in Docker and CI/CD configurations.