Swagger from JSON

Convert JSON schemas to Swagger/OpenAPI specifications online with validation and download options.

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5,324+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Swagger from JSON processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}

Computed Result

{
  "id": 1,
  "status": "active",
  "roles": [
    "admin"
  ]
}

Execution Mode Client-Side In-Browser JS

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About This Tool

This tool allows you to generate Swagger/OpenAPI specifications from JSON input. Simply paste your JSON schema or upload a JSON file, and the tool will convert it to a properly formatted Swagger YAML or JSON output. It validates the input JSON, processes it server-side using the swagger-php library, and provides a clean, syntax-highlighted result that you can copy or download. Perfect for developers creating API documentation from existing JSON schemas.

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How to Use

Paste your JSON schema into the text area or upload a JSON file using the file upload button.
Click the 'Generate Swagger' button to process the JSON.
View the generated Swagger/OpenAPI specification in the result area.
Use the copy button to copy the output or download it as a YAML or JSON file.

Frequently Asked Questions

Find Quick Answers

What JSON format does this tool support?

The tool supports standard JSON schemas that can be mapped to OpenAPI specifications, including object definitions, properties, types, and descriptions.

Can I upload large JSON files?

Yes, the tool handles files up to 10MB. For larger files, consider pasting the JSON directly into the text area.

What versions of OpenAPI/Swagger are supported?

The tool generates OpenAPI 3.0 specifications, which are compatible with most modern API documentation tools.

Is my data stored or shared?

No, all processing is done in memory and no data is stored or shared with third parties.

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