JSON to YAML Converter - Convert JSON to YAML Online

JSON_INPUT

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YAML_OUTPUT

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What is JSON to YAML Converter?

Convert JSON to YAML format for configuration files and more readable data structures. YAML is commonly used in Docker, Kubernetes, and CI/CD pipelines.

YAML (YAML Ain't Markup Language) is more human-readable than JSON. It's the standard for modern DevOps tools like Kubernetes, Docker Compose, GitHub Actions, GitLab CI, Ansible, and CloudFormation.

How to Convert JSON to YAML

Paste JSON: Add your JSON data or configuration file
Automatic conversion: Tool converts to YAML with proper indentation (2 spaces)
Review YAML: Check the clean, readable YAML output
Copy or download: Use in Kubernetes, Docker, or CI/CD configs
Add comments: YAML supports comments (# comment) - add them after downloading

Why Convert JSON to YAML?

Kubernetes Manifests

Kubernetes uses YAML for deployments, services, and configs. If you generate K8s resources programmatically in JSON, convert to YAML for proper kubectl apply compatibility.

Docker Compose

Docker Compose requires YAML (docker-compose.yml). Convert JSON config objects to YAML format for defining multi-container applications with services, networks, and volumes.

CI/CD Pipelines

GitHub Actions (.github/workflows/*.yml), GitLab CI (.gitlab-ci.yml), and CircleCI use YAML. Convert JSON build configs to YAML for version control and pipeline execution.

Configuration Files

Many modern tools prefer YAML over JSON for configs: Ansible playbooks, CloudFormation templates, Swagger/OpenAPI specs, ESLint configs (.eslintrc.yml). YAML is more readable and supports comments.

YAML Advantages Over JSON

Human readable: No brackets, braces, or quotes clutter
Comments support: Add # comments for documentation
Multi-line strings: Better for long text values
Less verbose: No quotes on keys, cleaner syntax
Indentation-based: Structure is visual and clear
References: YAML supports anchors and aliases for reuse

Key Features

Proper indentation: Consistent 2-space indentation (YAML standard)
Type preservation: Maintains strings, numbers, booleans, nulls
Nested structures: Converts deeply nested JSON correctly
Array formatting: Arrays use clean dash (-) notation
Download YAML: Save as .yaml or .yml file
Copy to clipboard: Paste directly into config files
Client-side: Uses js-yaml library in browser
Large files: Handles complex JSON structures

JSON vs YAML Example

JSON (verbose):

{
  "apiVersion": "v1",
  "kind": "Service",
  "metadata": {
    "name": "my-service"
  },
  "spec": {
    "ports": [
      {"port": 80, "targetPort": 8080}
    ]
  }
}

YAML (clean):

apiVersion: v1
kind: Service
metadata:
  name: my-service
spec:
  ports:
    - port: 80
      targetPort: 8080

Common YAML Use Cases

Kubernetes: Deployments, Services, ConfigMaps, Secrets
Docker: docker-compose.yml multi-container setups
GitHub Actions: CI/CD workflow definitions
Ansible: Playbooks for infrastructure automation
CloudFormation: AWS infrastructure as code
OpenAPI: API documentation specs

YAML Best Practices

Use 2-space indentation: YAML standard is 2 spaces (never tabs). Our converter follows this convention.

Add comments: After converting, add # comments to explain complex configs. This is YAML's biggest advantage over JSON.

Validate YAML: Use yamllint or IDE plugins to validate YAML syntax. Indentation errors break YAML files.

Use quotes sparingly: Only quote strings when necessary (special characters, leading zeros). YAML auto-detects types.

Related Tools

Before or after converting JSON to YAML: