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YAML to JSON Converter

Parse YAML and convert to JSON format. Handles anchors, aliases, multiline strings, and complex structures.

YAML to JSON ConverterGratisConvertersRuns in your browser

Works in your browser. What you paste or upload is processed on your device.

Key features of the YAML to JSON converter

  • Parses YAML 1.2 specification
  • Converts all YAML types to JSON equivalents
  • Handles YAML anchors and aliases
  • Supports multi-document YAML
  • Formatted and compact JSON output

How to use the YAML to JSON converter

  1. Paste your YAML

    Enter the YAML data or configuration you want to convert.

  2. Convert

    Click 'Convert to JSON' to parse the YAML and generate JSON.

  3. Review the output

    Check that the JSON correctly represents your YAML structure and data types.

  4. Copy or download

    Copy the JSON output or download as a .json file.

  5. Use in your application

    Use the JSON in your API, application, or debugging tool.

What is a YAML to JSON converter?

The YAML to JSON Converter parses YAML (YAML Ain't Markup Language) data and converts it to equivalent JSON format. It handles all YAML data types — strings, numbers, booleans, null, arrays, objects — and properly serialises them to JSON with correct type preservation.

YAML is widely used for configuration files (Docker Compose, Kubernetes, GitHub Actions, Ansible) due to its human-readable format. JSON is the standard for APIs and data interchange. Converting YAML to JSON enables using YAML-configured data in JSON-consuming systems.

Why use a YAML to JSON converter?

DevOps tools, CI/CD pipelines, and infrastructure-as-code tools commonly use YAML configuration. When you need to use that configuration data in APIs, debugging tools, or JSON-based systems, this converter provides instant, reliable YAML-to-JSON transformation.

YAML to JSON converter: frequently asked questions

Something else? Ask the team

What is YAML?

YAML (YAML Ain't Markup Language) is a human-readable data serialisation format commonly used for configuration files. Its syntax uses indentation for nesting (no brackets or quotes required), making it cleaner to read than JSON.

What are the main differences between YAML and JSON?

YAML supports comments (# comment), is less verbose (no quotes required for strings), uses indentation instead of brackets, and supports anchors/aliases for reuse. JSON is more strict but universally supported.

Does the converter handle YAML anchors?

Yes. YAML anchors (&anchor) and aliases (*anchor) are resolved during parsing — the referenced values are inlined in the JSON output.

Why might my YAML fail to convert?

YAML is sensitive to indentation — mixing tabs and spaces, incorrect nesting, or special characters in unquoted strings can cause parse errors. Check indentation consistency and quote strings containing special characters.

Can I convert Kubernetes or Docker Compose YAML?

Yes. Kubernetes manifests and Docker Compose files are valid YAML and can be converted to JSON. Multi-document YAML files (separated by ---) are handled as separate JSON objects.

Each one opens on its own page and works straight away, with no sign-up.

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Illustrative data
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