YAML to JSON Converter
Convert YAML to JSON in one step — paste your YAML and copy the JSON. Everything runs in your browser, so your data is never uploaded.
More presets
Jump to another preset — each opens its own page ready to go:
How to convert YAML to JSON
- Paste your YAML into the input box.
- The JSON is generated instantly as you type.
- Copy the JSON from the output box.
About converting YAML to JSON
JSON and YAML represent the same structured data in different styles — JSON is the standard for web APIs, while YAML is the readable choice for configuration. Converting YAML to JSON lets you move data into whichever format the next tool expects without rewriting it by hand.
This page converts YAML to JSON entirely in your browser, parsing and re-serializing locally. Your configs and payloads are never uploaded, queued or stored on a server.
Converts YAML into strict JSON for APIs, validators and tools that refuse YAML. Anchors, aliases and merge keys are resolved into their plain expanded values, so the JSON stands alone. Comments do not survive — JSON has nowhere to put them — which is worth knowing before round-tripping a heavily annotated config.
Frequently asked questions
How do I convert YAML to JSON?
Paste your YAML into the box and the JSON appears instantly below, ready to copy.
Is the conversion lossless?
Objects, arrays, strings, numbers, booleans and null convert cleanly. YAML-only features such as comments and anchors have no JSON equivalent.
Can I convert the other way too?
Yes — the converter works both ways; switch the direction toggle to reverse it.
Is my data uploaded?
No. The conversion happens entirely in your browser; nothing is sent to a server.
What happens to my YAML comments and anchors in JSON?
Comments are dropped, because JSON has no comment syntax at all. Anchors and aliases are expanded into the values they reference, so the data is complete and self-contained — the file just loses the deduplication and the annotations of the YAML original.