YAML ↔ JSON Converter

YAML (YAML Ain't Markup Language) and JSON are both popular data serialization formats. YAML is more human-readable with its indentation-based syntax, while JSON is more widely supported by APIs and programming languages. This tool converts between them instantly.

YAML vs JSON YAML supports comments, multi-line strings, and complex data types with a clean syntax. JSON is more strict but universally supported. Converting between them is a common task when working with configuration files (Docker Compose, Kubernetes, GitHub Actions) and APIs. All processing happens locally in your browser.

JSON indent:

YAML indent:

YAML

JSON

Free online tool for converting between YAML and JSON formats. YAML (YAML Ain't Markup Language) is a human-friendly data serialization format widely used in configuration files for Docker, Kubernetes, GitHub Actions, Ansible, and many other DevOps tools. JSON is the universal data interchange format for APIs and web applications.

The converter uses the js-yaml library for accurate YAML parsing that supports all YAML 1.2 features: nested structures, arrays, multi-line strings, anchors, and aliases. Error messages include line numbers for quick debugging. You can configure indentation size for both JSON (2 or 4 spaces) and YAML output.

All processing happens locally in your browser — your data is never sent to any server. Perfect for DevOps engineers working with Kubernetes manifests, developers converting API responses, and anyone who needs to transform data between YAML and JSON formats.