JSON to YAML Converter
JSON (JavaScript Object Notation) and YAML (YAML Ain't Markup Language) are both widely used data serialization formats. JSON is compact and universally supported in APIs and web applications, while YAML is more human-readable with its indentation-based syntax — making it the format of choice for configuration files in tools like Docker, Kubernetes, and GitHub Actions.
This converter handles bidirectional transformation: paste JSON and get clean, properly indented YAML output, or paste YAML and receive valid, formatted JSON. Both directions include error detection so you can immediately spot malformed input. No data leaves your browser — the conversion happens entirely client-side.
How it works
JSON → YAML: parse the JSON string into a JavaScript object, then serialize it using YAML dump with 2-space indentation. YAML → JSON: load the YAML string into a JavaScript object, then serialize it using JSON.stringify with 2-space indentation.
Use cases
- Converting JSON API responses into YAML configuration files for CI/CD pipelines
- Transforming Kubernetes or Docker Compose YAML configs to JSON for programmatic processing
- Migrating application configs between frameworks that prefer different formats
- Validating YAML or JSON syntax and quickly spotting formatting errors
- Preparing data payloads for REST APIs that require JSON from YAML source files