The JSON to YAML Converter transforms JSON into YAML and converts YAML back into JSON, instantly and in your browser. Paste your data, pick a direction, and copy or download the result — useful whenever you move between an application’s JSON and the YAML that configuration tools expect.
YAML is the format behind Kubernetes manifests, Docker Compose files, GitHub Actions workflows, Ansible playbooks, and countless CI configs, while JSON is what most APIs and programs speak. Converting between them by hand is fiddly and easy to get wrong with indentation; this tool handles nested objects, arrays, and types correctly every time.
How to convert between JSON and YAML
- Choose a direction — JSON → YAML or YAML → JSON.
- Paste your data into the input box; the result appears instantly.
- Adjust the indentation, or minify the JSON output if you need it compact.
- Copy the result or download it as a .yaml or .json file. Use Swap to round-trip.
JSON and YAML are two views of the same data
YAML is a superset of JSON, which means every JSON document is already valid YAML and the two describe the same underlying structure — objects (mappings), arrays (sequences), strings, numbers, booleans, and null. The difference is style: JSON uses braces, brackets, and quotes, while YAML uses indentation and is designed to be easy for people to read and write. Converting between them never loses the data; it only changes how it looks.
Why convert between them
A very common workflow is turning a JSON payload from an API or program into the YAML a DevOps tool needs — a Kubernetes resource, a Compose service, or a workflow file — or the reverse, feeding a YAML config into code that only parses JSON. YAML is friendlier for humans to edit and supports comments, whereas JSON is stricter and universally supported by programming languages, so teams often keep configs in YAML and convert to JSON at build or runtime.
Indentation, types, and gotchas
This converter lets you choose two- or four-space indentation and can minify the JSON output to a single line. It preserves types, but a few YAML quirks are worth knowing: unquoted values like yes, no, on, and off are booleans in older YAML, and a value like 1.0 is a number, so quote strings that must stay strings. Because the conversion runs entirely in your browser, large or sensitive configs are never uploaded anywhere.
Frequently Asked Questions
How do I convert JSON to YAML?
Choose the JSON → YAML direction, paste your JSON, and the YAML appears instantly. You can adjust the indentation and copy or download the result.
Can it convert YAML back to JSON?
Yes. Switch the direction to YAML → JSON (or click Swap), paste your YAML, and you get JSON — pretty-printed or minified.
Is YAML just JSON with different syntax?
Essentially, yes. YAML is a superset of JSON: they represent the same data structures, so converting between them preserves your data and only changes the formatting.
Why would I use YAML instead of JSON?
YAML is easier for people to read and edit and supports comments, which is why config-heavy tools like Kubernetes, Docker Compose, and GitHub Actions use it. JSON is stricter and supported everywhere in code.
Is my data uploaded anywhere?
No. The conversion runs entirely in your browser, so your JSON and YAML never leave your device.