PDF export

@pptx-editor.dev/pptx-to-pdf converts a deck to a PDF with the editor's own layout. It runs on Node.js and uses the EigenPal Pro License. Evaluation is permitted. Production use requires a commercial agreement. The browser cannot run it, so the PDF export is a server request that the user starts.

The server

Add a route that reads the PPTX bytes and sends back the PDF:

import { exportPdf } from '@pptx-editor.dev/pptx-to-pdf';

export async function POST(request: Request): Promise<Response> {
  const deck = new Uint8Array(await request.arrayBuffer());
  const { bytes } = await exportPdf(deck, { fidelityPolicy: 'best-effort' });
  return new Response(bytes, { headers: { 'Content-Type': 'application/pdf' } });
}

best-effort gives a PDF for content that the PDF can only approximate, and lists each approximation in diagnostics. The default strict policy throws PdfFidelityError instead. Hidden slides stay out of the PDF.

Keep limits on the route:

• Accept only requests from your own page. An Origin check stops other pages, but it is not authentication. Add authentication or a rate limit for a public route.
• Limit the upload size. A serverless platform can also cap the request and response bodies, so check the platform limit.
• Pass timeoutMs, and pass a signal that aborts when the client disconnects.
• Send fixed error text. An exception message can name parts of the uploaded file.

The browser

Save the deck and post the bytes when the user picks the export:

const deck = editor.save();
if (deck) {
  const response = await fetch('/api/convert', { method: 'POST', body: deck });
  if (response.ok) {
    const link = document.createElement('a');
    link.href = URL.createObjectURL(await response.blob());
    link.download = 'deck.pdf';
    link.click();
    setTimeout(() => URL.revokeObjectURL(link.href), 1000);
  }
}

save() returns null when a slide is damaged. The editor then shows why. Ignore a second pick while a conversion runs, and show a translated message for each failure status.

The demo

The React and Vue demos add Presentation as PDF to the Export menu and to File > Export. The function is api/convert.ts in the repository. The Vite development servers serve the same handler through examples/shared/pdf-export-plugin.ts, so bun run dev exports PDF with no package build. The demo accepts decks up to 4 MiB.