How Does Online PowerPoint-to-PDF Conversion Work?
Sending a presentation to the conversion service and receiving a PDF
The frontend uploads the selected PPT, PPTX or ODP file to /api/convert-ppt-to-pdf. The server-side conversion engine returns a PDF. PDF.js then renders that PDF in the browser for slide preview. The browser preview is not the conversion engine.
- The API must return a valid PDF response.
- The frontend checks the PDF signature before previewing or offering the download.
- The server must validate files independently of browser-side checks.