JSON to YAML

What this tool does

The converter parses JSON, then dumps YAML with a conservative schema. Anchors and custom tags are not generated. That keeps the YAML boring and reversible.

How to use it

1. Paste JSON.
2. Copy the YAML or download converted.yaml.
3. If you need the original JSON later, use YAML to JSON on the output.

Privacy

This tool processes files and text locally in your browser. Your content is not uploaded or stored by this site.

ConvertPass does not include your input in analytics, URLs, or error reports. Encoding: UTF-8. Limit: 2 MB (2.00 MB).

Limitations

• YAML features such as merge keys, custom tags, and binary type tags are not emitted.
• Very wide lines wrap at about 100 characters, which can change visual layout but not the parsed value.

Example

{"image":{"format":"png","local":true}}

image:
  format: png
  local: true

Troubleshooting

A string became an unquoted word

That is valid YAML. If a downstream tool is picky, quote the value in the YAML after conversion.

FAQ

Is every JSON document valid YAML?

JSON is a subset of YAML 1.2. This tool still re-serialises through a parser, so formatting changes. The data should round-trip for ordinary objects, arrays, strings, numbers, booleans, and null.

Will yes or no become booleans?

On the way from JSON, those values are already booleans or strings. On the way back, ConvertPass uses a JSON-compatible YAML loader so the classic YAML 1.1 yes/no country-code surprises are avoided.

Can I convert JSON Lines?

Convert one JSON value at a time, or wrap the lines in an array first.

Does this use a server?

No. js-yaml runs in the browser page.