JSON to YAML Converter
Convert JSON to YAML format instantly with validation
JSON Input
YAML Output
What Is JSON to YAML?
YAML (YAML Ain't Markup Language) is a human-readable format used in config files like Kubernetes manifests, Docker Compose, and GitHub Actions. It uses indentation instead of brackets. JSON and YAML are largely interchangeable for the same data: both represent objects, arrays, strings, and numbers. Converting JSON to YAML gives you a more readable config format.
This tool runs in your browser. Paste JSON and get YAML. Nothing is sent to a server. The conversion follows the YAML 1.2 spec.
JSON to YAML Examples
Convert JSON to YAML. Telecom-themed example:
Example: Subscriber record
YAML output:
Click the Sample button above to load more examples into the editor.
How to Use This Tool
Paste JSON
Paste your JSON into the left editor or upload a file. Use Sample for example data. The JSON should be valid.
View YAML Output
The right panel shows the YAML. Objects use key-value pairs with indentation. Arrays use - prefixes. Invalid JSON will show an error.
Download or Copy
Use Download or Copy to get the YAML. For the reverse, use YAML to JSON. For formatting JSON first, use the JSON Formatter.
When YAML Is Preferred
YAML is common in DevOps and infrastructure: Kubernetes configs, Docker Compose, CI/CD pipelines like GitHub Actions. It's easier to read and edit than JSON for config files. JSON is better for APIs and machine-to-machine exchange. Converting between them is straightforward since they represent the same data structures.
Config files like application.yml (Spring Boot) or .gitlab-ci.yml are typically YAML. If your source data is JSON (e.g. from an API or database export), converting here gives you the YAML format you need for deployment. For pulling out specific values from large JSON first, use the JSON Path tool.
Frequently Asked Questions
Is indentation significant in YAML?
Yes. YAML uses indentation to denote nesting. Spaces matter; tabs are not allowed. The converter produces valid indentation.
Can I convert YAML back to JSON?
Yes. Use the YAML to JSON tool.
Is my data sent anywhere?
No. Conversion runs in your browser.
Does YAML support comments?
Yes. YAML supports # comments. JSON does not. When converting JSON to YAML, comments are not added. If you need comments in your config, add them after conversion.
What about YAML anchors and aliases?
JSON has no equivalent for YAML's & and * reuse. The converter produces standard YAML without anchors. Duplicate structures will be repeated.
Related Tools
The YAML spec is at yaml.org. For JSON, see json.org and MDN.