Question 1

What YAML features does the parser support?

Accepted Answer

The parser handles the most common YAML patterns: key-value pairs, nested objects via indentation, arrays using the dash prefix, quoted strings, booleans (true/false/yes/no/on/off), null values (null and ~), integers, and floats. It also strips inline comments. Advanced features like anchors, aliases, multi-document streams, and flow sequences are not supported.

Question 2

Why is my YAML not converting correctly?

Accepted Answer

The most common causes are inconsistent indentation (mixing tabs and spaces), missing spaces after colons, or use of advanced YAML features like anchors and aliases. Make sure every level uses consistent 2-space indentation and that all keys are followed by a colon and a space.

Question 3

How are YAML booleans converted to JSON?

Accepted Answer

YAML accepts true, false, yes, no, on, and off as boolean literals. This parser converts all six to their JSON boolean equivalents: true becomes true and false, no, off become false. If you need the literal string 'yes' in JSON, quote it in your YAML: 'yes'.

Question 4

Does the tool support multi-document YAML files?

Accepted Answer

No. Multi-document YAML files separated by --- are not supported. Only single-document YAML is parsed. If your file has multiple documents, split them manually and convert each one separately.

Question 5

Is there a reverse tool for JSON to YAML?

Accepted Answer

Yes. The JSON to YAML tool on this site converts in the opposite direction. Both tools run entirely in your browser with no server calls and no file uploads required.

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