A Kubernetes-style manifest
apiVersion: v1
kind: Pod
metadata:
name: nginx
labels:
app: web{
"apiVersion": "v1",
"kind": "Pod",
"metadata": {
"name": "nginx",
"labels": {
"app": "web"
}
}
}YAML ↔ JSON Converter
Convert YAML to JSON or JSON to YAML instantly, right in your browser.
JSON
The result will appear here.
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About this tool
YAML and JSON describe the same kind of data — nested objects, arrays, strings, numbers — with different syntax. YAML is the format of choice for Kubernetes manifests, GitHub Actions workflows, Docker Compose files and most modern config files, because it reads cleanly without JSON's braces and quotes. JSON is what your code actually parses at runtime.
This converter runs js-yaml, the same YAML 1.2 parser used by ESLint and many other JavaScript tools, entirely in your browser. Nothing you paste is uploaded anywhere.
How to use it
- Paste YAML on the left to convert it to JSON, or switch to "JSON → YAML" and paste JSON instead.
- The result updates as you type.
- Use the mode buttons to swap direction — the current output becomes the new input, so you can round-trip a file to check the conversion is lossless.
- Copy the result or download it as a .json or .yaml file.
Examples
Common problems
- The converter reports an error on YAML that looks fine.
- YAML is whitespace-sensitive — check that every level of nesting uses consistent indentation (spaces, not tabs), and that a value containing a colon is quoted, e.g. url: "http://example.com".