AscendLab

Developer tools

YAML 转 JSON

Free browser tool

YAML to JSON Converter

Convert YAML into formatted JSON locally for APIs, config migration, QA notes, and structured examples.

YAML input
Paste YAML and convert it to formatted JSON in the browser.
JSON output
Valid YAML converted to JSON.
Quick answer

YAML to JSON conversion parses YAML and outputs formatted JSON.

It is useful when an API, script, or validator expects JSON instead of YAML.

Best inputs

Use valid YAML

Fix indentation and parse errors first.

Expect comments to disappear

JSON cannot represent YAML comments.

Conversion method
The tool parses YAML and serializes the result as JSON.
YAML is parsed with a browser-bundled parser.
The parsed value is formatted with two-space JSON indentation.
Syntax errors are shown before output can be copied.
Example, Assumption, and Limitation
Use the result as a practical estimate or transformation, then confirm edge cases for critical work.

Example

name: app becomes { "name": "app" }.

Assumption

The YAML represents data that can be expressed as JSON.

Limitation

Comments, anchors, and custom YAML semantics may need manual review.

Common use cases
These pages are built for lightweight browser-side work, examples, and planning.

API payloads

Convert YAML examples to JSON.

Config QA

Inspect structured values.

Docs

Provide JSON alternatives.

Migration

Move simple config between formats.

Frequently asked questions

Does this upload YAML?

No. YAML parsing and JSON formatting happen in your browser.

Can it convert nested YAML?

Yes. Nested objects, arrays, strings, booleans, numbers, and null values are converted to JSON.

Can it preserve YAML comments?

No. JSON does not support comments, so comments are not represented in the output.

What should I do before using the JSON?

Review tool-specific config requirements and validate the JSON where it will be used.

Suggested workflow

YAML and JSON workflow

Validate YAML, convert it to JSON, then format or inspect JSON.

Step 1
Validate YAML
Check source YAML first.
Open tool
Step 2
Convert to JSON
Rewrite YAML as JSON.
Open tool
Step 3
Format JSON
Inspect or format the JSON output.
Open tool