How it works
A client-side parser builds an object tree, then JSON.stringify formats the result. Anchors and aliases may be unsupported depending on parser strictness.
How to use YAML to JSON
- Paste YAML respecting indentation with spaces, not tabs.
- Fix parser errors pointed at line numbers.
- Copy pretty-printed JSON from the output pane.
- Validate JSON in a schema validator if required.
Worked examples
Concrete numbers and cases you can check against the tool above.
K8s fragment
Convert a small Deployment YAML snippet into JSON for a jest fixture.
When to use YAML to JSON
Kubernetes and CI configs often start as YAML while app runtimes expect JSON. Local conversion keeps secrets off remote formatters.
Common use cases
- Convert docker-compose snippets for a Node script.
- Turn GitHub Actions YAML fragments into test fixtures.
- Migrate Ansible vars to JSON for a cloud function.
- Debug indentation mistakes with immediate feedback.
Inputs and outputs
- YAML 1.2 subset common in configs
- JSON output with 2-space indent typical
Privacy
This tool runs entirely in your browser. Your data never leaves your device — nothing is uploaded to our servers.
Frequently asked questions
- Are tabs allowed in YAML?
- Standard YAML forbids tab indentation; use spaces only.
- Do multi-document YAML files work?
- Some tools accept --- separated docs; others require splitting manually.
- Is my API key safe?
- Parsing stays in-browser, but never paste production secrets into any website you do not trust.