YAML to JSON Converter

Convert YAML data to JSON format with syntax validation and error detection.

YAML Input

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JSON Output

Sample YAML Templates

YAML to JSON Conversion Guide

What This Tool Delivers

Powered by the Monaco editor (the same engine behind VS Code) and the definitive yaml library, this converter provides line-numbered editing, syntax highlighting, and real-time conversion while you paste, upload, or edit YAML. The underlying parser supports both YAML 1.1 and YAML 1.2 specifications, ensuring compatibility with all common YAML documents and data schemas.

The tool validates YAML syntax according to official specifications, reports parsing errors with clear messages, and converts your data seamlessly. Use it to transform Docker Compose files, Kubernetes manifests, CI/CD configurations, or any YAML documents into JSON for APIs, documentation, or data processing. The parser handles lists, nested objects, multi-line strings, comments, and all standard YAML features correctly.

VS Code–style editing for fast navigation and precise edits
YAML 1.1 and 1.2 specification support
Real-time conversion with instant JSON output
Formatted or minified JSON output options
Sample templates for common YAML structures

YAML Conversion Best Practices

Indentation Matters: Use spaces consistently (not tabs) for YAML indentation. The converter preserves structure based on indentation levels.

Comments Handling: YAML comments are removed during conversion since JSON doesn't support them. Keep important notes in separate documentation.

Format Selection: Use formatted JSON for readability and debugging, then switch to minified for production APIs or when file size matters.

Validation First: Ensure your YAML is valid before conversion. The tool uses the yaml library which passes all yaml-test-suite tests and highlights syntax errors to help you fix issues quickly.

Version Compatibility: The converter supports both YAML 1.1 and 1.2 formats automatically. YAML 1.2 is a valid superset of JSON, ensuring seamless conversion between formats.

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