YAML ↔ JSON Converter
Convert between YAML and JSON formats. All in your browser.
Try it with this example
Paste YAML (key: value) and convert to JSON. Or paste JSON and convert to YAML.
What is this tool?
YAML and JSON are both used for config and data. YAML is human-friendly with indentation and minimal punctuation; JSON is strict and machine-oriented. The YAML JSON Converter converts between them. Paste YAML and get JSON; paste JSON and get YAML. Handy when moving between ecosystems—Docker Compose (YAML) and API payloads (JSON), or when a tool expects one format and you have the other. All conversion runs in your browser.
YAML supports comments, multi-line strings, and anchors—features JSON lacks. Converting YAML to JSON drops comments and resolves anchors; the result is valid JSON. Converting JSON to YAML produces clean YAML, but you lose any structure that existed only in comments. For most config and data interchange, the round-trip is lossless for the actual data. Use the tool to validate YAML (invalid YAML won't convert) or to generate starter YAML from a JSON example.
Common use cases: API docs show JSON examples; you want YAML for a config file. Or you have a YAML config and need to send equivalent JSON to an API. Kubernetes, GitHub Actions, and many CI systems use YAML; REST APIs typically use JSON. This tool bridges the gap without leaving your editor. Paste, convert, copy.
Large files may take a moment; the tool handles typical config sizes well. No server processing—everything stays local. For sensitive configs (secrets, credentials), that's important. Free and instant. Bookmark it for the next format mismatch.
Essential for developers working across YAML and JSON ecosystems.