YAML to JSON Converter Online
Convert YAML to JSON format instantly in your browser. This free tool runs entirely client-side — your configuration files and data never leave your device.
JSON ↔ YAML Converter
Convert between JSON and YAML formats. Perfect for Kubernetes configs, CI/CD pipelines, and configuration files.
About JSON ↔ YAML Conversion
- JSON (JavaScript Object Notation) — strict syntax with quoted keys, used for APIs and data exchange.
- YAML (YAML Ain't Markup Language) — human-friendly format using indentation, popular for configs (Kubernetes, Docker Compose, GitHub Actions, etc.).
- Swap button carries output to input for round-trip conversion.
- Sample data uses a Kubernetes Deployment manifest — a real-world use case for this tool.
- Everything runs in your browser — no data is sent over the network.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for both humans and machines to read and write. It is the standard format for REST APIs, web applications, and many programming language data structures. JSON supports objects, arrays, strings, numbers, booleans, and null values.
Common use cases for YAML to JSON conversion
Developers frequently convert YAML to JSON when consuming configuration data in applications, sending data to REST APIs, or processing configs programmatically. Many programming languages have better built-in JSON parsing support than YAML. Converting YAML to JSON is also useful when validating configs or integrating with tools that only accept JSON input.
Frequently Asked Questions
Will YAML comments be preserved when converting to JSON?
No. JSON does not support comments, so any comments in your YAML file will be stripped during conversion. The data itself is preserved completely.
Can I convert multi-document YAML to JSON?
Multi-document YAML files (separated by ---) need to be converted one document at a time, since JSON does not have an equivalent multi-document concept. Each document converts to a separate JSON object.
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