JSON to YAML
Paste your JSON and Happycapy returns tidy, properly-indented YAML, with structure and data types preserved. Great for turning API responses or JSON data into the readable YAML that config files, CI pipelines, and Kubernetes manifests use. Free to start.
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How it works
Paste your JSON
Drop in your JSON — an API response, a config object, or any JSON data.
Choose indentation
Specify 2-space or 4-space indentation, or take the clean 2-space default.
Get readable YAML
The tool converts the JSON into properly-indented YAML with structure and data types preserved.
Copy or download
Copy the YAML into your config file, or download it for your project.
Who is this for
DevOps and platform engineers
Turn JSON into the YAML that Kubernetes, Docker Compose, and CI/CD pipelines prefer.
Developers writing config
Convert a JSON payload into cleaner, human-editable YAML for maintainable config files.
Anyone editing config by hand
YAML is easier to read and edit than JSON — convert once and work in the friendlier format.
Six prompt-engineering tips that move the needle
Small changes in how you write a prompt make the biggest difference in output.
Make sure the JSON is valid
Trailing commas, comments, or unquoted keys will fail to parse — fix them first.
Pick your indentation
Ask for 2-space or 4-space to match your project's convention.
Keep types unquoted
Request that numbers and booleans stay unquoted so the YAML behaves like the source.
Expect long output for deep nesting
Deeply nested JSON becomes long YAML — review it for readability.
Let special characters be quoted
Strings with colons or leading symbols are auto-quoted to keep the YAML valid — that's expected.
Redact sensitive values
Remove tokens or personal data from the JSON before converting.
What to expect
For valid JSON, the conversion is fast and reliable, producing clean, correctly-indented YAML with data types preserved. Standard API responses and config objects convert cleanly. The only common issue is invalid JSON in the source (a trailing comma or unquoted key), which must be fixed first.
Example: A user pasted a JSON object describing a service config and asked for 2-space YAML. The tool returned readable YAML with the keys unquoted, the services array as a bulleted list, the version kept as a string, and the replica count kept as an unquoted number.
Good to know
- The source JSON must be valid — trailing commas, comments, or unquoted keys will cause a parse error first.
- Very large or deeply nested JSON produces long YAML that may need a readability check.
- JSON has no comments to carry over, so the YAML output won't contain any unless you add them.
Frequently asked questions
What does a JSON to YAML converter do?
It reads JSON and outputs the same data as YAML — a more human-readable format widely used for configuration. Keys, nesting, arrays, and value types are preserved, since both formats represent the same data structures.
Why convert JSON to YAML?
YAML is easier to read and edit by hand, so it's the preferred format for config files, CI/CD pipelines, and tools like Kubernetes and Docker Compose. Converting a JSON payload to YAML makes it friendlier to maintain.
Can I control the indentation?
Yes — specify 2-space or 4-space indentation, and the YAML is formatted accordingly. If you don't say, a clean 2-space default is used, which is the most common convention.
Are data types kept intact?
Yes — numbers, booleans, and null are rendered as proper YAML scalars rather than quoted strings, so the output behaves the same as the source JSON when parsed.
Does it handle deeply nested JSON?
Yes — nested objects and arrays are converted into properly indented YAML. Very deep structures can become long, so review the output for readability on large inputs.
Is my data kept private?
Your JSON is used only to produce the conversion and isn't published. As with any online tool, avoid pasting secrets like tokens or passwords — redact sensitive values first.
What about special characters in strings?
Strings with characters that would be ambiguous in YAML (like colons or leading symbols) are quoted automatically so the YAML stays valid and parses back correctly.
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