Do you support Kubernetes and GitHub Actions YAML?

Yes for ordinary maps, lists, and scalars. Anchors and custom tags are passed through the YAML 1.2 parser.

Is my manifest uploaded?

No. Conversion runs in the browser with the yaml package.

What about JSON to YAML?

Use the JSON to YAML converter. Same engine, opposite direction.

Will comments survive?

Comments are not round-tripped into JSON. They disappear because JSON has no comment syntax.

Can I convert a multi-document stream?

Paste one document. Multi-doc --- separators should be split first.

Runs in your browser · Last updated 4 September 2026

YAML to JSON Converter

Convert YAML to JSON in the browser. Maps, lists, and scalars — no upload.

YAML

{
  "service": "boring-tools",
  "replicas": 2,
  "env": {
    "NODE_ENV": "production"
  },
  "ports": [
    3000
  ]
}

How to use this tool

Paste YAML from a compose file, workflow, or config.
Copy the JSON.
Validate it in the JSON validator if you need line numbers.

Worked example

The sample has a service name, replica count, env map, and a ports list. JSON output uses an object for env and an array for ports. Numbers stay numbers.

Frequently asked questions

Do you support Kubernetes and GitHub Actions YAML?: Yes for ordinary maps, lists, and scalars. Anchors and custom tags are passed through the YAML 1.2 parser.
Is my manifest uploaded?: No. Conversion runs in the browser with the yaml package.
What about JSON to YAML?: Use the JSON to YAML converter. Same engine, opposite direction.
Will comments survive?: Comments are not round-tripped into JSON. They disappear because JSON has no comment syntax.
Can I convert a multi-document stream?: Paste one document. Multi-doc --- separators should be split first.