YAML to JSON Converter

What does this converter do?

YAML and JSON both describe the same kind of structured data — nested maps and lists — but YAML's indentation-based, comment-friendly syntax is what most CI/CD pipelines, Kubernetes manifests, and application config files use, while JSON is what most APIs and JavaScript code expect. This converter moves data between the two directly: parsing YAML into an equivalent JSON structure, or serializing JSON back out as clean, properly indented YAML.

It's built for anyone reading a config file that needs to become a JSON payload, or the reverse — turning an API response or JSON config into YAML for a deployment file or CI pipeline.

How to use it

How the conversion works

YAML parsing follows the standard YAML specification — nested maps, lists, strings, numbers, booleans, and multi-line block scalars all resolve to their equivalent JSON types. Converting JSON to YAML does the reverse, serializing the same structure with YAML's indentation-based block style by default. With "Clean output" turned off, the result switches to YAML's compact flow style instead — nested structures written inline with brackets and braces, similar in spirit to minified JSON, which is useful when file size matters more than readability.

Features & benefits

Why this runs entirely in your browser

Config files and API payloads often contain real credentials or business data, so nothing is uploaded. Parsing and conversion run locally in the tab, which means it keeps working offline once the page has loaded and nothing pasted or uploaded into it persists after the tab is closed.

Common uses

Converting a Kubernetes manifest or CI config into JSON to inspect it programmatically, turning a JSON API response into YAML for a deployment file, or reformatting application config between whichever format a given tool expects.