YAML to JSON Converter
What is YAML to JSON Converter
YAML to JSON Converter parses YAML input and outputs valid, formatted JSON entirely in your browser. Developers commonly need this when migrating configuration files to systems that expect JSON, extracting values from YAML to use in an API, or debugging YAML-based configurations by seeing them in a stricter, validated format.
How to use
- Paste your YAML into the input field on the left.
- Click Convert to generate the JSON output.
- Optionally choose 2-space or 4-space indentation for the output.
- Click Copy to copy the JSON to your clipboard.
When to use it
Got config in YAML but your API only speaks JSON? Paste the YAML here and you get the equivalent JSON back instantly, ready to drop into a Postman request or a curl command. No hand-editing, no throwaway script, just the payload you needed.
Frequently asked questions
Can YAML features like anchors and aliases be converted?
Yes. YAML anchors (&) and aliases (*) are resolved during parsing, and the resulting merged data is output as plain JSON. Comments in the YAML are ignored since JSON does not support them.
Does this tool run in my browser or send data to a server?
All conversion happens entirely in your browser using JavaScript. No data is ever sent to any server, so your YAML remains private.
What happens if my YAML is invalid?
The tool shows a clear error message indicating the problem, just like a linter. Fix the YAML and try again.
Why does JSON not support comments but YAML does?
JSON was designed as a minimal data interchange format focused on simplicity and machine parsing. YAML targets human-readable configuration files where comments are essential for documentation. This converter strips comments since JSON has no comment syntax.
Can I share this tool with my inputs pre-filled?
Yes. The URL updates automatically as you type. Copy it from the address bar or use the Share button — anyone who opens the link will see your exact inputs ready to go.
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