The playground at paperjsx.com/playground lets you paste a PresentationSpec JSON payload, render it server-side, and preview the resulting slides -- all without an API key or authentication.
What the Playground Does
You write or paste a JSON payload in the left editor panel.
Press Generate (or Cmd+Enter / Ctrl+Enter) to send it to POST /api/playground.
The server validates the document, renders up to 6 slides, and returns base64-encoded slide previews plus a downloadable PPTX.
A quality report summary (deck score, finding count, and top findings) appears alongside the preview.