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Install a PDF package for Node.js, such as pdfkit or pdfmake, using npm.
Create a new endpoint in your NestJS application to generate the PDF file.
Retrieve the object or JSON data that you want to include in the PDF file from your API endpoints or database.
Define the layout and formatting of the PDF document using the PDF package.
Populate the PDF document with data. You can do this by iterating through the JSON data and using the PDF package to add text, tables, charts, and other elements to the document.
Once the PDF has been completed, save it to a file or send it as a response to the client.
Test the PDF generation and make any necessary adjustments to ensure that the output matches your expectations.
If you would like users to be able to download the PDF, you can include a link to the endpoint in your application's UI or respond with the file download headers in your NestJS controller.