JSON to YAML Converter
Convert JSON to YAML format instantly with validation
JSON Input
YAML Output
What Is JSON to YAML?
If your REST API returns JSON but your deployment pipeline expects YAML — say, a Kubernetes manifest or a Docker Compose file — you're stuck manually reformatting it. YAML (YAML Ain't Markup Language) uses indentation instead of brackets, which makes it much easier to read in config files. JSON and YAML represent the same data structures, so converting between them is clean and lossless. This is the tool for that — paste your JSON and get valid YAML 1.2 out, instantly.
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
Start with your JSON in the left-hand pane, typed, pasted or brought in through Upload. Sample fills it with a ready-made record if you'd rather preview the conversion before using real data. The input has to parse as valid JSON first.
View YAML Output
YAML shows up on the right as soon as the JSON parses. Objects turn into indented key-value lines and every array item gets a leading -. If the JSON is broken, that pane shows the parse error instead.
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 jq.
Frequently Asked Questions
How do I convert JSON to YAML online for free?
Paste your JSON into the editor on this page and the YAML appears instantly in the output panel. No signup, no upload to a server — it all runs in your browser.
What's the difference between JSON and YAML?
Both formats represent the same data — objects, arrays, strings, numbers, and booleans. JSON uses curly braces and quotes; YAML uses indentation and is generally easier to read for config files. YAML also supports comments (with #), which JSON does not.
Is there a way to go the other direction, YAML into JSON?
Yes. Use the YAML to JSON tool on this site.
Is my data sent anywhere?
No. Everything runs in your browser — no data ever leaves your machine. Safe to use with API keys, tokens, or any sensitive config.
Does YAML support comments?
Yes. YAML supports # comments. JSON does not. When converting JSON to YAML, comments are not added automatically. You can add them manually after conversion.
Related Tools
The YAML spec is at yaml.org. For JSON, see json.org and MDN.