JSON to YAML Converter

How to Convert JSON to YAML

Converting JSON to YAML is straightforward with this tool. Paste your JSON into the left panel and the equivalent YAML appears instantly on the right. Need to go the other direction? Click Swap to switch to YAML-to-JSON mode.

JSON Example

{
  "server": {
    "host": "0.0.0.0",
    "port": 8080
  },
  "database": {
    "engine": "postgres",
    "name": "myapp_prod"
  }
}

Equivalent YAML Output

server:
  host: "0.0.0.0"
  port: 8080
database:
  engine: postgres
  name: myapp_prod

The YAML version is more concise — no curly braces, no quotation marks around most strings, and indentation defines the structure instead of punctuation. This is why YAML is the preferred format for configuration files in tools like Docker Compose, Kubernetes, Ansible, and GitHub Actions.

How to Convert YAML to JSON

To convert YAML to JSON, click the Swap button above the editor panels, then paste your YAML into the right-side panel. The converter parses the YAML structure and outputs properly formatted JSON with consistent indentation on the left.

This is especially useful when you need to feed YAML configuration data into an API that only accepts JSON, or when debugging YAML files that have subtle indentation errors — converting to JSON and back can help surface issues.

JSON vs YAML: Key Differences

Both JSON and YAML are human-readable data serialization formats, but they serve different strengths. Choosing the right one depends on your use case.

When to Use JSON

JSON is the standard for web APIs and data interchange. If you're building a REST API, working with JavaScript/TypeScript, or need to transmit structured data between services, JSON is the natural choice. It has native support in every browser and virtually every programming language.

When to Use YAML

YAML shines in configuration scenarios. Kubernetes manifests, Docker Compose files, GitHub Actions workflows, Ansible playbooks, and many CI/CD pipelines all use YAML because it's easier to read and write by hand, and it supports comments — a critical feature when documenting infrastructure configuration.

Frequently Asked Questions