Paste the YAML into a browser-based converter and it outputs the equivalent JSON instantly, with conversion back the other way just as easy. It runs entirely on your device, which matters because YAML files are usually configs that contain hostnames, keys and other things you should not paste into a random website.
Free YAML to JSON converter. Parse YAML config into clean JSON for APIs, tooling and validation. Handles nested maps, lists, comments and scalars.
Open YAML to JSON → Free toolFree JSON to YAML converter. Turn JSON config or API data into clean, readable YAML for Kubernetes, CI pipelines, Docker Compose and app config files.
Open JSON to YAML →YAML and JSON describe the same kinds of data: maps, lists, strings, numbers and booleans. YAML 1.2 was even designed so that valid JSON is also valid YAML. That makes conversion lossless in the common cases, and it is often the quickest way to sanity-check a YAML file, because a strict JSON view makes structure and typing mistakes obvious.
YAML is the language of Kubernetes manifests, CI pipelines and docker-compose files, which routinely include internal service names, environment settings and sometimes credentials. A client-side converter parses the YAML in your browser and never transmits it, so debugging a production config does not mean leaking it.
No. Parsing and conversion happen entirely in your browser.
Yes. A matching JSON to YAML tool does the reverse conversion the same local way.
For the standard data types, maps, lists, strings, numbers and booleans, the conversion is lossless. YAML-only features like comments and anchors do not exist in JSON.