YAML to JSON Converter
Convert YAML to JSON format instantly with validation
YAML Input
JSON Output
What Is YAML to JSON?
YAML and JSON both represent structured data—objects, arrays, strings, numbers, and booleans. YAML is human-friendly with indentation and no brackets; JSON is ubiquitous in APIs and config systems. Converting YAML to JSON turns keys and nested structures into standard JSON objects and arrays. The YAML 1.2 specification and JSON specification define the formats. YAML is a superset of JSON, so most YAML documents convert cleanly.
This tool parses your YAML and outputs equivalent JSON. Conversion runs entirely in your browser. Nothing is sent to a server, so it's safe to use with production configs, Kubernetes manifests, or sensitive data.
YAML to JSON Examples
Convert YAML to JSON. Telecom-themed example:
Example: Subscriber record
JSON output:
Click the Sample button above to load more examples into the editor.
How to Use This Tool
Paste or Upload YAML
Copy your YAML and paste it into the left editor. You can also click Upload to load a .yaml or .yml file from your computer. The Sample button loads example data if you want to test things out.
View the JSON Output
The right panel shows the converted JSON. Use Minify for compact single-line output, or leave it formatted for readability. Invalid YAML will show an error—fix it first using the YAML Validator.
Copy or Download
Use Copy to put the result on your clipboard, or Download to save it as a .json file. For the reverse conversion, use JSON to YAML. For formatting YAML first, use YAML Formatter.
When YAML to JSON Helps
Kubernetes manifests, Docker Compose files, and GitHub Actions workflows are often written in YAML. If you need to pass that config to a system that expects JSON—an API, a database, or a script—this tool does the conversion. For extracting specific values from large YAML, you can convert to JSON and use the JSON Path tool.
Config files like application.yml (Spring Boot) or .gitlab-ci.yml are YAML. Converting to JSON helps when integrating with tools that only accept JSON, or when you need to validate structure against a JSON schema.
Some APIs and databases store or accept JSON. If your source data is in YAML, converting here gives you the JSON you need. For converting to XML instead, use YAML to XML.
Frequently Asked Questions
Does it preserve comments?
No. JSON has no comment syntax. YAML comments are dropped when converting to JSON. If you need to preserve comments, keep the data in YAML.
What about YAML anchors and aliases?
Anchors and aliases are resolved during conversion. The output JSON contains the expanded structure, not the references.
Is my data private?
Yes. Conversion runs entirely in your browser using JavaScript. No data is sent to any server. You can confirm this by opening your browser's Network tab while using the tool.
What about multiline strings in YAML?
YAML multiline strings (literal or folded blocks) convert to JSON strings. Newlines are preserved. For complex multiline content, the JSON output may use escaped newlines.
Can I validate the output JSON?
Yes. Copy the output and paste it into the JSON Formatter or JSON Validator to verify structure and syntax.
Related Tools
YAML spec. JSON spec. MDN. YAML quick reference. RFC 8259. YAML. Postman.