Does the converter preserve data types?

Yes. Numbers stay as numbers, booleans as booleans, and null as null. Strings are quoted only when necessary to avoid YAML parsing ambiguity.

Can I convert YAML back to JSON?

Yes. JConvert supports bidirectional conversion. See the YAML to JSON tool.

Is the output safe for Kubernetes configs?

The converter uses the safe JSON_SCHEMA setting, producing only JSON-compatible types. The output is valid for Kubernetes, Docker Compose, and any other tool that consumes YAML.

Does my data leave my browser?

No. All processing is 100% client-side. Your config files and secrets stay on your machine.

Convert JSON to YAML Online

YAML is the de-facto configuration language for Kubernetes, Docker Compose, Ansible, GitHub Actions, and dozens of other tools in the DevOps ecosystem. If you have data in JSON and need to produce a YAML config, this converter handles the translation instantly.

JConvert strips away the curly braces and commas, producing clean, properly indented YAML that is easy to read, diff, and commit to version control.

Everything runs in your browser — no data is sent to a server.

Open JSON to YAML Converter

What this converter does

The converter takes valid JSON and outputs equivalent YAML. Objects become maps, arrays become sequences, and scalar types (strings, numbers, booleans, null) are preserved. The output uses 2-space indentation by default for readability.

It uses the js-yaml library with the JSON_SCHEMA setting, meaning only safe, JSON-compatible types are emitted — no YAML-specific tags or executable constructs.

Common use cases

Converting JSON API responses into Kubernetes manifest format
Generating Docker Compose or GitHub Actions workflow files from JSON templates
Translating Terraform JSON outputs into YAML for documentation
Preparing Ansible playbook data from structured JSON sources
Making JSON config files more human-readable for code review

How to use JConvert

Paste or upload your JSON on the converter page.
Select YAML as the output format.
Click Convert — the YAML output appears instantly, ready to copy or download.

Notes and limitations

YAML does not support duplicate keys at the same level — if your JSON has duplicates, the last value wins.
JSON strings that look like YAML special values (e.g. "true", "null") are automatically quoted in the output to avoid ambiguity.
Multi-line strings are output as YAML block scalars when appropriate.
Comments cannot be added during conversion since JSON does not support comments.
Maximum input size is 10 MB.

Privacy and security

The conversion is performed entirely in your browser. Your configuration data, secrets, and environment variables are never transmitted anywhere. The JSON_SCHEMA setting in the YAML library prevents any code execution during parsing, adding an extra layer of safety.

Example

JSON input

{
  "apiVersion": "v1",
  "kind": "Service",
  "metadata": {
    "name": "my-service"
  },
  "spec": {
    "ports": [{ "port": 80, "targetPort": 8080 }]
  }
}

YAML output

apiVersion: v1
kind: Service
metadata:
  name: my-service
spec:
  ports:
    - port: 80
      targetPort: 8080

Ready to convert your data?

Open JSON to YAML Converter

Frequently Asked Questions

Does the converter preserve data types?: Yes. Numbers stay as numbers, booleans as booleans, and null as null. Strings are quoted only when necessary to avoid YAML parsing ambiguity.
Can I convert YAML back to JSON?: Yes. JConvert supports bidirectional conversion. See the YAML to JSON tool.
Is the output safe for Kubernetes configs?: The converter uses the safe JSON_SCHEMA setting, producing only JSON-compatible types. The output is valid for Kubernetes, Docker Compose, and any other tool that consumes YAML.
Does my data leave my browser?: No. All processing is 100% client-side. Your config files and secrets stay on your machine.

Read guides on the blog →