Convert JSON to YAML Online Free
Overview
Docker Compose, Kubernetes manifests, GitHub Actions, and most CI/CD pipelines use YAML. If you have a JSON config and need YAML, this converter maps it with proper indentation and scalar type handling. Numbers, booleans, and null values are written as YAML types, not quoted strings.
How to Use This Tool
Paste your JSON into the input panel and click Convert to YAML. The tool outputs indented YAML with 2-space indentation. Copy and paste it into your compose file, k8s manifest, or CI config.
Ready to get started? It's free, no registration required, and your files never leave your device.
PDF Tool →Frequently Asked Questions
Are there data types that JSON supports but YAML does not?
No. YAML is a superset of JSON in terms of data types. Every JSON value maps to a valid YAML value. Numbers, strings, booleans, null, arrays, and objects all have direct YAML equivalents.
How are JSON arrays converted to YAML?
JSON arrays become YAML block sequences with a dash prefix for each item. [1, 2, 3] becomes a three-item YAML sequence with each number on its own line.
Does the converter handle multi-line strings?
Yes. Long strings are preserved as quoted scalars or block scalars (| style) in YAML, keeping the content accurate and readable.