YAML JSON Converter

The YAML JSON Converter is a free browser-based utility for converting between YAML and JSON, two of the most common data serialization formats used in configuration files, API responses, and infrastructure-as-code definitions. Whether you need to transform a Kubernetes manifest or Docker Compose file from YAML into JSON for programmatic processing, or convert a JSON API response into YAML for a configuration file, this tool handles the conversion instantly.

It auto-detects the input format so you can simply paste your data and get the converted output without manually selecting the direction. JSON output indentation is configurable between 2 and 4 spaces to match your team's coding style.

All processing happens entirely within your browser, so sensitive configuration data, API keys, and internal settings are never sent to any external server. The built-in YAML parser supports key-value pairs, nested objects, arrays, numbers, booleans, null values, quoted strings, comments, block scalars (literal | and folded >), and escape sequences—covering the most commonly used YAML syntax in day-to-day development workflows.