YAML to JSON Converter

Convert YAML configuration files to JSON format for APIs, JavaScript, and systems requiring JSON input.

100% client-side No signup Free forever
// how to use

How to Use YAML to JSON Converter

  1. Paste your YAML content into the input area
  2. Click "Convert to JSON" to transform the data
  3. Use "Load Sample" to see an example conversion
  4. Copy the JSON output using the "Copy JSON" button
  5. Use "Clear" to start a new conversion
// about

About YAML to JSON Converter

While YAML is preferred for human-edited configuration, many APIs and programming environments require JSON. Our converter transforms YAML into valid JSON, bridging human-readable configs with JSON-based systems.

Conversion Process

YAML features map directly to JSON equivalents. Indented structures become nested objects. Lists become JSON arrays. Scalars become appropriate JSON types (strings, numbers, booleans, null). The conversion is lossless for standard YAML content.

YAML-Specific Features

  • Comments: Stripped during conversion (JSON doesn't support comments)
  • Anchors/Aliases: Expanded to duplicated content
  • Multi-line Strings: Preserved with appropriate escaping
  • Custom Tags: May require handling depending on type

Integration Scenarios

Testing YAML configs in JSON-based tools, converting Kubernetes manifests for API submission, or migrating configuration formats all require YAML-to-JSON conversion. Our tool handles these conversions accurately.

// faq

Frequently Asked Questions

Why convert YAML to JSON?
JSON is required by many APIs, parsers, and tools. Converting YAML configs to JSON enables: using with JSON-only APIs, programmatic processing, validation with JSON Schema, compatibility with more programming languages, and importing configurations into systems that only accept JSON.
What happens to YAML comments during conversion?
YAML comments (# comment) are lost during JSON conversion since JSON doesn't support comments. If preserving comments is important, consider keeping the YAML source file and only converting for JSON-requiring systems. We warn when comments will be stripped.
How are YAML-specific features converted?
Anchors and aliases (*ref) are resolved to their full values. Multi-line strings are converted to single strings with appropriate escaping. YAML's flexible quoting becomes JSON's strict double-quotes. All data types map correctly to JSON equivalents.
Is my YAML valid if conversion fails?
Conversion errors indicate YAML syntax issues. Common problems: incorrect indentation (YAML is whitespace-sensitive), mixing tabs and spaces, unquoted strings with special characters, or invalid type coercion. Our tool highlights the error location and suggests fixes.
Can I convert multiple YAML documents at once?
YAML supports multiple documents in one file (separated by ---). Since JSON doesn't have this concept, we either convert each document separately, wrap them in a JSON array, or let you choose which document to convert. Each document becomes a valid JSON output.
How do I minify the JSON output?
Choose "Compact" output to remove whitespace, creating minimal JSON for APIs or storage. Choose "Pretty" for human-readable formatting with indentation. Both are functionally identical - compact saves bytes, pretty aids debugging. Default is pretty-printed with 2-space indent.