YAML to JSON

YAML to JSON is a free online converter that transforms YAML-formatted text into valid JSON in seconds. YAML is widely used for configuration files in tools like Docker, Kubernetes, Ansible, and CI/CD pipelines because of its human-readable, indentation-based syntax. JSON, on the other hand, is the de facto standard for APIs, web applications, and data interchange. Being able to move between the two formats quickly is an essential skill for modern developers.

This tool bridges the gap between these two popular formats without requiring any local setup, libraries, or command-line knowledge. Whether you are migrating a config file, debugging a data structure, or preparing a payload for an API call, this converter handles the transformation accurately and instantly — preserving data types, nested objects, arrays, and null values throughout the process.

Using the tool is straightforward. Paste your YAML content into the input field on the left. The converter will parse the YAML in real time and display the equivalent JSON structure in the output panel on the right. You can then copy the result, download it as a .json file, or paste it directly into your project. The output is properly formatted with indentation by default, making it immediately readable and ready to use.

The tool supports all standard YAML features including nested mappings, sequences (arrays), multi-line strings, anchors and aliases, boolean values, integers, floats, and null types. Each YAML type is correctly mapped to its JSON counterpart — for example, YAML booleans like true, false, yes, and no are normalized to JSON booleans, and YAML null values (~ or null) become JSON null.

There are a few edge cases to be aware of. YAML allows duplicate keys within the same mapping, but JSON does not — in such cases, the last value for a duplicated key is typically kept. YAML comments (lines starting with #) are not representable in JSON and will be silently stripped from the output. Additionally, YAML anchors and merge keys are resolved before conversion, so the resulting JSON reflects the fully expanded structure rather than the original references.