YAML to JSON
Convert YAML to JSON.
Paste YAML to convert it to pretty-printed JSON. Invalid YAML shows a clear error. Parsing uses the js-yaml library, all locally in your browser.
Your input is processed locally in your browser — nothing is uploaded, stored or logged.
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How it works
- 1 Paste your YAML.
- 2 The JSON output appears live.
- 3 Copy or download the .json file.
Common use cases
- Convert YAML config to JSON.
- Feed YAML data to a JSON API.
- Inspect YAML as JSON.
- Migrate between formats.
Frequently asked questions
Is my input sent to a server?
No. Everything runs locally in your browser — your input is never uploaded, stored or logged.
What about invalid YAML?
A clear error message is shown and the output is cleared until the YAML is valid.
Is it really free?
Yes — free, with no signup and no limits.