JSON ↔ YAML Converter
Convert between JSON and YAML formats with automatic detection. Everything runs locally in your browser.
What is JSON and YAML?
JSON (JavaScript Object Notation) and YAML (YAML Ain't Markup Language) are both data serialization formats, but they serve different purposes. JSON is compact and machine-readable, perfect for APIs and config files where size matters. YAML is human-readable with cleaner syntax, making it ideal for configuration files like Docker Compose, Kubernetes, and CI/CD pipelines.
Converting between JSON and YAML is a common task when working with different tools and services. Some APIs return JSON but your infrastructure expects YAML. Some CI/CD systems use YAML but you want to validate the structure as JSON first.
This converter automatically detects whether your input is JSON or YAML and converts it to the opposite format. Unlike other online converters, qtoolkit.dev processes everything client-side in your browser, so your configuration files never leave your machine.
Key Differences
JSON uses braces and brackets with strict syntax, requires double quotes for strings, and doesn't support comments. YAML uses indentation for structure, supports comments with #, allows unquoted strings, and is more readable for humans but sensitive to whitespace errors.