Toolzie

JSON to TypeScript

Paste JSON and get TypeScript interfaces instantly


  

  






  

    
How to Use the JSON to TypeScript Converter

    
Paste JSON. Generates matching TypeScript interfaces with proper types. Copy and use.

    
Manual interface writing is tedious. Auto-infer types from JSON data.

  

  

    
Frequently Asked Questions

    

      
Types?

      
Numbers, strings, booleans, nested objects, arrays.

    

    

      
Nested?

      
Yes, separate interfaces for nested objects.

    

    

      
Optional?

      
Yes, marks inconsistent properties.

    

    

      
Name?

      
Customize root interface name.

    

  











  

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About This Tool

    
Convert JSON objects to TypeScript interfaces automatically with the Toolzie JSON to TypeScript converter. Paste any JSON and get a fully typed TypeScript interface in seconds — a huge time-saver for TypeScript developers.

    
How to Use

    
    

  1. Paste your JSON object into the input field.
    2. 

  2. The TypeScript interface is generated instantly.
    3. 

  3. Copy the interface and paste it into your TypeScript project.
    4. 

  4. Adjust the interface name in the options if needed.
    5. 
    

    
Frequently Asked Questions

    

    

      Does it handle nested objects?
      
Yes — nested JSON objects generate nested TypeScript interfaces automatically.

    

    

      What happens with JSON arrays?
      
Arrays are typed as the appropriate array type, e.g. string[] or User[].

    

    

      Does it handle null values?
      
Null values are typed as the detected type unioned with null, e.g. string | null.

    

    

      Can I use this output directly in my project?
      
Yes — the generated interfaces are valid TypeScript and can be pasted directly into your .ts or .d.ts files.