This component will help you in converting your file extensions and downloading them. The forge component can perform 30 conversions as follows:

Pdf to jpg, Pptx to jpg, Csv to jpg, Docx to jpg, Xls to jpg, Doc to jpg, Png to jpg, Txt to jpg, Pdf to Txt, Doc to Txt, Docx to Txt, Pdf to Png, Svg to Png, Jpg to Png, Docx to jpg, Xls to Png, Doc to Png, Pptx to Png, Txt to Png, Pptx to Pdf, Svg to Pdf, Docx to Pdf, Xls to Pdf, Doc toPdf, Png to Pdf, Txt to Pdf, Jpg to Pdf, Xls to Csv, Doc to Docx, Docx to doc.

You can simply add file converter component as a dependency and you can use the web block, server action and structures in your required module.