YAML ↔ JSON Converter - Instant & Free

How the YAML/JSON Converter Works

1. 01Paste your YAML or JSON into the input field
2. 02Select the conversion direction: YAML to JSON or JSON to YAML
3. 03The tool validates your input and converts instantly
4. 04Copy the result or download as a .yaml or .json file

YAML vs JSON: When to Use Which

YAML is preferred for configuration files (Docker Compose, Kubernetes, GitHub Actions) because it is more human-readable and supports comments. JSON is the standard for APIs and data interchange because every programming language has a native JSON parser. When converting, note that YAML supports features JSON does not: comments, anchors, and multi-line strings. These will be lost when converting to JSON.

When to Use a YAML/JSON Converter

Use this converter when switching between configuration formats - for example, converting Docker Compose YAML to JSON for API calls, or transforming GitHub Actions workflow YAML into JSON for programmatic editing. It is also useful when copying configuration snippets between systems that use different formats.

Common Use Cases

• —Converting Kubernetes manifests between YAML and JSON for API calls and kubectl commands
• —Transforming Docker Compose YAML files to JSON for programmatic editing JSON Formatter & Validator - Instant Results
• —Switching CI/CD pipeline configs (GitHub Actions, GitLab CI) between formats
• —Converting Ansible playbooks to JSON for integration with automation APIs XML Formatter - Prettify & Validate Free

Expert Tips

• ✻Add comments to your YAML before converting to JSON - they serve as documentation even though they will be stripped in the JSON output
• ✻Watch for YAML's implicit type coercion: bare values like 'yes', 'no', 'on', 'off' are interpreted as booleans - quote them if you need strings
• ✻For Kubernetes work, kubectl accepts both YAML and JSON - convert to JSON when you need to pipe output to jq for filtering

Frequently Asked Questions

What YAML features are lost when converting to JSON?→

JSON does not support comments, anchors (&), aliases (*), or multi-line string indicators (| and >). Comments are stripped during conversion. Anchors and aliases are expanded to their full values. Multi-line strings are converted to regular JSON strings with \n escapes.

Will the converter preserve data types?→

Yes, the converter preserves strings, numbers, booleans, null values, arrays, and objects. YAML bare values like 'true', 'false', 'null', and numeric strings are converted to their JSON equivalents. If you need a string like 'true' to remain a string, quote it in YAML.

Can I convert multi-document YAML?→

Multi-document YAML (using --- separators) is treated as separate documents. The converter processes the first document. For multi-document files, convert each document separately or combine them into a single YAML structure first.