In HTML, there is no direct way to convert a `.tsx` file to a `.jsx` file since `.tsx` files are specifically used in React applications to include TypeScript code. However, we can manually convert the TypeScript syntax in a `.tsx` file to JavaScript syntax in a `.jsx` file.

Here is an example of converting TypeScript syntax in a `.tsx` file to JavaScript syntax in a `.jsx` file:

{`// .tsx file
import React from 'react';

const ExampleComponent: React.FC = () => {
  const [count, setCount] = React.useState(0);

  const increment = () => {
    setCount(count + 1);
  };

  return (
    

      
Count: {count}
      Increment
    
  );
};

export default ExampleComponent;`}

The above code is a simple React functional component written in TypeScript (.tsx). To convert it to JavaScript syntax in a `.jsx` file, remove the types and type annotations, and the import statement for React:

{`// .jsx file
import React, { useState } from 'react';

const ExampleComponent = () => {
  const [count, setCount] = useState(0);

  const increment = () => {
    setCount(count + 1);
  };

  return (
    

      
Count: {count}
      Increment
    
  );
};

export default ExampleComponent;`}

Now, the code is converted to JavaScript syntax in a `.jsx` file. Remember to update the file extension from `.tsx` to `.jsx` before using it in your React application.