JSON YAML XML Converter

The JSON YAML XML Converter reads structured data in one format and rewrites it in another, entirely inside your browser tab. Paste JSON and get indented YAML; paste YAML and get valid JSON; turn a JSON object into XML, or read an XML document back into a JSON tree. The conversion fires the moment you stop typing, so there is no "Convert" button and no round-trip to a server. The parsers ship with the page as JavaScript, which means your payload never leaves the machine you are on: no upload, no queue, no account. You can safely paste an API key, an internal Helm value, or a row of customer data without it touching a remote host.

Internally the tool parses your input into an in-memory object tree, then serializes that tree into the target format. That two-step design is why round-tripping behaves predictably. A JSON object becomes YAML with real indentation and block scalars for multi-line strings, and on the way in it resolves YAML anchors and aliases into their values. For XML it maps object keys to element tags, arrays to repeated sibling elements, attributes to prefixed keys, and text content to a value field, so an XML-to-JSON-to-XML trip keeps attributes distinct from child nodes.

The everyday uses are concrete. Kubernetes and Docker Compose want YAML, but code generators and REST responses hand you JSON, so you convert to reuse a manifest. You turn a Postman response into readable YAML for a docs page, or feed a legacy SOAP or RSS XML feed into a JSON-based frontend, or fix a CI snippet a teammate pasted in the wrong dialect.

A practical tip: when a conversion fails, read the reported line before anything else. YAML is whitespace-sensitive, so a stray tab or a sibling key at the wrong indent is the usual cause; JSON usually breaks on a trailing comma or an unquoted key. Because everything runs locally and updates live, it suits the quick, repeated transforms you make while actively debugging a config.