YAML to JSON Converter
Convert YAML to JSON online and validate it at the same time. Errors show the exact line. Free, runs in your browser.
How to use the YAML to JSON Converter
Validate, beautify and clean JSON, CSV, XML and YAML.
- Paste or upload your data
- Choose the options
- Copy or download the result
Tips
- Invalid JSON shows the exact line and column. “Auto-fix” repairs comments, trailing commas and single quotes.
- Numbers and key order are kept exactly as written – nothing is rounded.
- CSV: any delimiter is detected automatically; pick the one you want for the output.
- YAML: comments are kept, and you can convert YAML → JSON or paste JSON to get YAML.
Example
Input: name: demo
ports: [80, 443]
Output: {"name":"demo","ports":[80,443]}
Frequently asked questions
How do I convert YAML to JSON?
Paste your YAML, choose JSON as the output and copy or download the result.
Why does my YAML fail to convert?
Most often an indent is wrong or a tab is used. YAML allows only spaces, and the error shows the line.
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