YAML to JSON Converter

YAML and JSON describe the same thing - maps, lists, and scalars - so any valid YAML document has an exact JSON equivalent. This tool parses your YAML with a real YAML engine (not a regex), builds the underlying data structure, and serializes it back out as JSON with the formatting you choose. Because JSON is a subset of YAML, valid JSON also passes straight through unchanged.

Everything happens client-side as you type, so it stays fast and private. You control the indentation (2 or 4 spaces, tabs, or fully minified), can sort keys alphabetically for clean diffs, and can copy or download the result in one click.

A single YAML file can hold several documents separated by --- - this is how Kubernetes manifests and other configs pack a Namespace, a ConfigMap, and a Deployment into one file. JSON has no equivalent separator, so when the tool sees more than one document it wraps them in a JSON array, preserving order. A single document converts to a single JSON object or value, not a one-element array.

JSON is simpler than YAML, so a few YAML-only features are resolved or dropped. Comments have no place in JSON and are removed. Anchors and aliases ( &name / *name ) are expanded to their actual values, so the JSON is fully self-contained. Special YAML scalars are normalized to JSON-safe values, and non-standard tags are rejected rather than guessed at.

If the parser hits a problem - a bad indent, a tab where spaces belong, a duplicate key - you get the exact line and column and the offending line is highlighted, so you can fix it without hunting.

Yes. The conversion runs 100% in your browser with no network calls - you can confirm it with the browser's network tab open, and it keeps working offline. Nothing you paste, upload, or generate leaves the page, which is why it is fine for real manifests, environment files, and CI configs.