YAML to JSON & JSON to YAML converter
Convert configuration and data files between YAML and JSON instantly. Processed completely in your browser — your infrastructure configs and secret keys never touch a remote server.
How to convert between YAML and JSON
- Select your conversion direction using the top toggle (YAML → JSON or JSON → YAML).
- Paste your source data or click Sample to load a Kubernetes service manifest.
- The converted file generates instantly on the right. Customize formatting with the Indent selector.
- Click Copy Output or Download to save the converted file directly to your disk.
Key differences between YAML and JSON
| Feature | YAML | JSON |
|---|---|---|
| Comments | Supported using # comment syntax. | Not allowed by standard JSON specifications. |
| Hierarchy | Defined by consistent whitespace indentation. | Defined by explicit brackets {} and []. |
| Readability | High human readability, popular in DevOps configs. | Strict machine parseability, popular in web APIs. |
| Types | Supports scalars, lists, maps, and multiline text blocks. | Strings, numbers, booleans, arrays, objects, null. |
Frequently asked questions
Is my YAML or JSON data safe from exposure?
Yes. The converter runs locally in your browser. Unlike traditional online tools that store pastes on remote databases, DevSandbox never logs, transmits, or exposes your configuration files.
Does converting to JSON preserve comments?
Standard JSON does not support comments, so comments present in the YAML file are omitted when converting to JSON. Converting from JSON to clean YAML generates properly formatted indentation.
Can I convert Kubernetes manifests and Docker Compose files?
Yes. This converter handles complex nested lists, key-value mappings, and multiline string blocks commonly found in DevOps files.