YAML to JSON
Convert YAML to clean, formatted JSON instantly — browser-based, no uploads.
YAML Input
How to convert YAML to JSON
- Paste your YAML into the input area (or use the sample provided).
- Click Convert.
- Copy the JSON output with the Copy button.
Privacy — processed in your browser
Conversion runs entirely in your browser using a built-in parser — no server call is made and no data is uploaded.
Frequently Asked Questions
What YAML features are supported?
Scalars (strings, numbers, booleans, null), block mappings (key: value), block sequences (- item), nested structures, quoted strings, inline flow notation, and block scalars (| and >). Anchors, aliases, and YAML tags are not supported.
Will YAML comments be preserved?
No — JSON has no comment syntax. YAML comments (lines starting with #) are stripped during conversion.
What causes a YAML parse error?
Common causes: inconsistent indentation (tabs mixed with spaces), missing colons after keys, and unclosed quoted strings. YAML uses spaces only — tabs are invalid.
Is there a size limit?
There is no hard limit — the only constraint is your browser's memory. For files over a few MB, conversion may take a second or two.