OpenAPI to JSON Converter
Paste an OpenAPI document in YAML (or JSON) and get it converted to clean, formatted JSON.
Paste an OpenAPI document in YAML below to convert it to clean, formatted JSON.
Conversion happens entirely in your browser using a standard YAML parser - your document is never sent to a server.
What Does This Tool Do?
Many OpenAPI documents are authored in YAML for readability, but some tools and libraries expect JSON. This tool parses a YAML (or already-JSON) OpenAPI document and outputs it as clean, formatted JSON.
Why Use This Tool?
Useful when a code generator, testing tool, or API gateway specifically requires a JSON OpenAPI file, but your source document is maintained in YAML.
How to Use the OpenAPI to JSON Converter
- Paste your OpenAPI document (YAML or JSON).
- Click Convert to see the formatted JSON output.
- Copy the result.
Troubleshooting
A parsing error usually points to an indentation mistake or an unquoted special character in the YAML - check the line mentioned in the error message first.