JSON tool
Paste an API payload, tsconfig, or a config object. Get YAML with 2-space or 4-space indent. Conversion stays on your device.
Like the tool? Find a bug?Share with usPaste JSON. Convert in this tab with js-yaml. Files stay on this device. Comments, trailing commas, and JSON lines are accepted.
YAML will appear here.Guide
01
Objects become maps, arrays become lists, and scalars keep their YAML types. js-yaml dumps YAML 1.2 in your tab — there is no server round-trip.
02
Sample, Nested, List, Docs, and Comments are starting points. Switch indent, sort keys, or quote every string when a consumer is picky.
03
Trailing commas, // comments, and JSON lines are accepted in this tab. Invalid JSON still shows a parse error.
Use it
Nested objects, arrays of objects, booleans, numbers, null, and strings. Split docs writes a JSON array as YAML documents. Flow and flush lists match Kubernetes-style dumps. Drop nulls removes those object keys. The 50,000 character cap still applies.
FAQ
No. Parsing and dumping happen in the browser. There is no account and no API call.
Quotes forces double-quoted scalars so values like on or no cannot be misread as booleans by older YAML 1.1 parsers.
Yes. Comments and trailing commas are stripped in this tab. Two or more JSON values on their own lines load as an array. Split docs then writes them as YAML documents.
Paste is capped at 50,000 characters so a huge dump cannot freeze the tab.