Which YAML version is supported?

YAML 1.2 core behaviour, which is what current configuration tooling emits and consumes.

Why did my YAML fail to convert?

Either it is not valid YAML — a tab character or a misaligned block, usually — or it uses something JSON cannot express, such as a custom tag or a non-finite number. The message says which.

Are anchors and aliases handled?

Yes. An alias is replaced by the value it points at. A self-referencing alias is rejected, because expanding it would never terminate.

What happens to comments?

They are dropped. JSON has no syntax for comments, so keep the YAML file if the comments matter.

Can I convert a multi-document YAML stream?

One document at a time. Split on the `---` separators first, since JSON has no equivalent of several documents in one file.

JSON Kitchen

Convert YAML to JSON

Formatted JSON out, with real errors when YAML has no equivalent.

Paste JSON

or drag & drop a JSON file

Empty document

UTF-8Lines 0Characters 0

What it does

Configuration arrives as YAML; APIs and fixtures want JSON. The document is parsed and written back as indented JSON, ready to validate, diff or minify. YAML is the larger language, so anything without a JSON counterpart stops the conversion rather than being quietly dropped.

Example

YAML

replicas: 2
image:
  name: nginx
  tag: "1.27"

JSON

{
  "replicas": 2,
  "image": {
    "name": "nginx",
    "tag": "1.27"
  }
}

Highlights

Anchors and aliases expanded, so the JSON is self-contained
Named errors for custom tags, NaN, Infinity and circular aliases
Output is formatted and ready for the rest of the toolkit
Key order follows the YAML document
Round-trips with the JSON to YAML converter

Frequently asked questions

Which YAML version is supported?: YAML 1.2 core behaviour, which is what current configuration tooling emits and consumes.
Why did my YAML fail to convert?: Either it is not valid YAML — a tab character or a misaligned block, usually — or it uses something JSON cannot express, such as a custom tag or a non-finite number. The message says which.
Are anchors and aliases handled?: Yes. An alias is replaced by the value it points at. A self-referencing alias is rejected, because expanding it would never terminate.
What happens to comments?: They are dropped. JSON has no syntax for comments, so keep the YAML file if the comments matter.
Can I convert a multi-document YAML stream?: One document at a time. Split on the `---` separators first, since JSON has no equivalent of several documents in one file.

Back to the editor

JSON Kitchen

Convert YAML to JSON

Formatted JSON out, with real errors when YAML has no equivalent.

Paste JSON

or drag & drop a JSON file

Empty document

UTF-8Lines 0Characters 0

What it does

Example

YAML

replicas: 2
image:
  name: nginx
  tag: "1.27"

JSON

{
  "replicas": 2,
  "image": {
    "name": "nginx",
    "tag": "1.27"
  }
}

Highlights

Anchors and aliases expanded, so the JSON is self-contained
Named errors for custom tags, NaN, Infinity and circular aliases
Output is formatted and ready for the rest of the toolkit
Key order follows the YAML document
Round-trips with the JSON to YAML converter

Frequently asked questions

Which YAML version is supported?: YAML 1.2 core behaviour, which is what current configuration tooling emits and consumes.
Why did my YAML fail to convert?: Either it is not valid YAML — a tab character or a misaligned block, usually — or it uses something JSON cannot express, such as a custom tag or a non-finite number. The message says which.
Are anchors and aliases handled?: Yes. An alias is replaced by the value it points at. A self-referencing alias is rejected, because expanding it would never terminate.
What happens to comments?: They are dropped. JSON has no syntax for comments, so keep the YAML file if the comments matter.
Can I convert a multi-document YAML stream?: One document at a time. Split on the `---` separators first, since JSON has no equivalent of several documents in one file.

Back to the editor

Convert YAML to JSON

What it does

Example

Highlights

Frequently asked questions

Related tools

Convert YAML to JSON

What it does

Example

Highlights

Frequently asked questions

Related tools