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JSON to YAML Converter

Convert JSON to YAML and YAML to JSON online. Free bidirectional converter with instant results.

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What is a JSON to YAML Converter?

This tool converts data between JSON (JavaScript Object Notation) and YAML (YAML Ain't Markup Language) — the two most popular data serialization formats in modern software development. JSON dominates in APIs, web applications, and package configs, while YAML is the standard for infrastructure-as-code tools like Kubernetes, Docker Compose, GitHub Actions, and Ansible. Being able to quickly convert between them saves time when working across different parts of the stack.

How to Use This Tool

  1. To convert JSON → YAML: Paste valid JSON in the left panel and click "JSON → YAML". The YAML equivalent appears on the right.
  2. To convert YAML → JSON: Paste YAML in the right panel and click "YAML → JSON". The structured JSON appears on the left.
  3. Copy the output and use it directly in your Kubernetes manifests, CI/CD pipelines, or API request bodies.

Common Use Cases for Developers

  • Kubernetes configs: Convert JSON schema examples from API docs into YAML format for K8s manifests and Helm charts.
  • CI/CD pipelines: Transform JSON config snippets into YAML for GitHub Actions, GitLab CI, or CircleCI workflow files.
  • Docker Compose: Convert JSON service definitions into the YAML format docker-compose requires.
  • API documentation: Convert YAML OpenAPI specs to JSON for tools that require JSON input, or vice versa.
  • Config migration: When migrating from JSON-based configs to YAML-based tools (or back), convert entire files quickly.

Tips & FAQ

  • JSON vs YAML tradeoffs: JSON is stricter (no comments, explicit syntax) making it better for machine parsing. YAML is more human-readable and supports comments, making it better for manually-edited config files.
  • YAML gotchas: Indentation is significant in YAML (use spaces, never tabs). Strings like yes, no, on, off are interpreted as booleans — quote them if you mean literal strings.
  • Limitations: This tool handles common YAML structures (objects, arrays, strings, numbers). Complex YAML features like anchors (&), aliases (*), and multi-line blocks (|, >) require a full YAML parser.