About yaml2json.dev
yaml2json.dev is a free, fast, and private online tool that converts YAML to JSON instantly in your browser. No data is sent to any server — all conversion happens client-side.
Why Convert YAML to JSON?
YAML and JSON are both popular data serialization formats, but they serve different purposes. YAML is human-friendly and commonly used for configuration files, while JSON is the standard for APIs and data interchange. Converting between them is a frequent task for developers working with tools like Kubernetes, Docker Compose, CI/CD pipelines, and REST APIs.
YAML vs JSON
| Feature | YAML | JSON |
|---|---|---|
| Readability | Highly readable, uses indentation | Verbose with brackets and quotes |
| Comments | Supported | Not supported |
| Data Types | Rich (dates, nulls, multiline strings) | Basic (strings, numbers, booleans, null) |
| Use Cases | Config files, DevOps, CI/CD | APIs, data storage, web apps |
Features
- Real-time YAML to JSON conversion as you type
- Syntax validation with clear error messages
- Works entirely in your browser — no server processing
- Supports complex YAML structures including nested objects and arrays
- Clean, formatted JSON output