YAML to JSON Converter

Professional YAML to JSON Conversion

The YAML to JSON Converter transforms YAML (YAML Ain't Markup Language) data into JSON (JavaScript Object Notation) format, making it compatible with modern APIs, web applications, and JavaScript frameworks. This free online converter supports YAML 1.1 and 1.2 specifications, handles multi-document YAML files, preserves anchors and aliases, maintains data types, and provides both pretty-printed and minified output options.

Why Convert YAML to JSON?

Key Features

• ✓YAML 1.1 and 1.2 Support: Full compatibility with both YAML specifications for maximum flexibility.
• ✓Multi-Document YAML: Handle YAML files with multiple documents separated by --- directives.
• ✓Anchors and Aliases: Preserve YAML anchors (&) and aliases (*) by resolving references during conversion.
• ✓Data Type Preservation: Automatically detect and preserve strings, numbers, booleans, nulls, arrays, and objects.
• ✓Block Scalars: Handle multi-line strings with | (literal) and > (folded) block scalar indicators.
• ✓Comment Support: YAML comments are parsed correctly (though not preserved in JSON output).
• ✓Pretty Print Output: Formatted JSON with 2-space indentation for easy reading and debugging.
• ✓Minified Output: Compact single-line JSON for production use and reduced file size.
• ✓Error Highlighting: Clear error messages with descriptions when YAML is invalid or malformed.
• ✓No File Size Limits: Convert YAML files of any size - completely free with no restrictions.

Common Use Cases

Kubernetes Config Conversion: Convert Kubernetes YAML manifests to JSON for programmatic processing, validation, or alternative deployment tools.

Docker Compose to JSON: Transform Docker Compose YAML files to JSON for integration with orchestration systems or custom deployment scripts.

CI/CD Pipeline Configs: Convert GitLab CI, GitHub Actions, or CircleCI YAML configs to JSON for analysis and validation tools.

Ansible Playbooks: Transform Ansible YAML playbooks to JSON for integration with automation frameworks or custom tooling.

API Testing: Convert YAML test data and fixtures to JSON for use with API testing frameworks and mock servers.

How to Use the YAML to JSON Converter

1. 1.Paste your YAML data into the input area. The tool validates YAML syntax and displays clear error messages if invalid.
2. 2.Choose output format: pretty print (formatted with indentation) or minified (compact single-line).
3. 3.Click "Convert to JSON" to transform your YAML. The conversion happens instantly in your browser.
4. 4.Review the JSON output and download the file or copy to clipboard for use in your application.

YAML Features Explained

---
document: 1
data: "First"
---
document: 2
data: "Second"

defaults: &defaults
  timeout: 30
  retry: 3

production:
  <<: *defaults
  host: "prod.example.com"

description: |
  This is a multi-line
  string that preserves
  line breaks.

summary: >
  This is a folded string
  that joins lines into
  a single line.

Data Type Conversion

Best Practices

Privacy and Security

All YAML to JSON conversion happens entirely in your browser using JavaScript. Your data never leaves your device, never touches our servers, and is never stored or logged anywhere. This ensures complete privacy and security for sensitive configuration files, credentials, or proprietary data.

Why This Tool is 100% Free

YAML to JSON conversion is a fundamental data transformation that developers need frequently. We believe this essential tool should be completely free with no artificial limitations. There are no file size limits, no premium tiers, and no feature restrictions - just a fast, reliable converter that works for everyone.

Frequently Asked Questions