When should I use YAML vs JSON?

Use YAML for configuration files, Kubernetes manifests, Docker Compose, CI/CD pipelines (GitHub Actions, GitLab CI), and Ansible — it is more human-readable with less syntax noise. Use JSON for API requests and responses, package.json, language-agnostic data exchange, and any context where a JSON parser is guaranteed. YAML is a superset of JSON, so valid JSON is valid YAML.

What is the biggest gotcha when converting JSON to YAML?

String values that look like other types. In YAML, "true", "false", "yes", "no", "null", and numbers without quotes are interpreted as their typed equivalents. If your JSON has string values like "true" or "null", they must be quoted in YAML: 'true' or "null". Our converter handles this automatically.

Can I use this converter for Kubernetes manifests?

Yes — Kubernetes configuration is YAML. Convert your JSON kubectl output to YAML format for storing in version control. Or paste an existing YAML manifest to get the JSON equivalent for use in scripts or Terraform. Note that Kubernetes accepts both YAML and JSON for kubectl apply.

What YAML features does this converter support?

This converter supports standard YAML features: nested objects and arrays, multiline strings, all scalar types (strings, numbers, booleans, null), and proper indentation. Anchors (&), aliases (*), and complex YAML-specific features are not supported — use a server-side converter for advanced YAML.

How does YAML handle special characters in strings?

YAML requires quoting strings that contain special characters like colons (:), hash signs (#), curly braces ({}), square brackets ([]), or that start with certain characters. Single quotes preserve literal content. Double quotes allow escape sequences. Our converter automatically adds appropriate quotes for strings that need them.

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YAML ↔ JSON Converter

Convert JSON to YAML and YAML to JSON instantly online. Handles nested objects, arrays, and special characters. Free browser-based YAML JSON converter for developers.

About this tool

Convert between YAML and JSON format instantly in your browser. Paste your JSON configuration and convert it to YAML for Kubernetes manifests, Docker Compose files, GitHub Actions workflows, or Ansible playbooks. Or convert YAML back to JSON for API requests or JavaScript consumption. Handles nested objects, arrays, strings with special characters, booleans, and numbers correctly.

JSON Input

YAML Output

name: my-service
version: 1.0
replicas: 3
config:
port: 8080
    debug: false
    tags:
      - production
      - api

How we calculate this

All calculations run entirely in your browser — no data is sent to any server. Here is exactly how this tool works:

Select the conversion direction — JSON to YAML or YAML to JSON
Paste your JSON or YAML content in the left editor panel
The converted output appears instantly in the right panel
Click Copy to copy the converted output to your clipboard

Frequently Asked Questions

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