Quick answer: export carousel slides as a single PDF for a document-style post or as individual images for platform uploads, at the resolution and aspect ratio the network expects. Always reopen the exported file, because clipping, blurriness, and watermarks usually only appear at export.

Choose the format

  • PDF: keeps the slides in one ordered document, ideal for a document-style carousel that stays in sequence.
  • Individual images (PNG/JPG): needed when the platform accepts a set of images rather than a document.
  • PNG for sharp text and graphics; JPG for photographic slides where file size matters.

Get the dimensions right

Use the platform's real pixel size rather than a generic square. A carousel that is designed at the wrong aspect ratio gets letterboxed or cropped, and text near the edge can be cut off. Keep important content inside the safe zone.

The export checklist

  1. Confirm the slide count and order before exporting.
  2. Export at full resolution, not a screen capture.
  3. Check that fonts are embedded or rendered so text does not reflow.
  4. Inspect every corner for a watermark.
  5. Reopen the file and read it full-screen.

The common failures

  • Blurry text: caused by exporting at low resolution or rasterizing too early.
  • Clipped elements: content outside the safe zone or the wrong canvas size.
  • Font changes: the export environment lacks the font, so it substitutes.
  • Order problems: slides renamed or uploaded out of sequence.
  • Hidden marks: a watermark added only at download.

After the cutout or design step

If the slides include product cutouts, confirm the transparent edges render correctly in the chosen format, since not every export path handles transparency the same way.

The PostNitro alternatives hub compares editors and their export options.

The bottom line

Pick PDF for an ordered document and full-resolution images for platform uploads, match the network's real pixel size, and treat the reopened export as the real test. Designing the slides is only half the job; a clean, correctly sized export is what actually posts.

Export checks before you post

Confirm every slide is included and the order matches the story, then export at the platform dimensions rather than resizing one image everywhere. Keep a transparent or clean background where the platform expects it, and check that text stays inside the safe area on the smallest screen. A ZIP with the images and a caption file keeps the set organized, while a separate native share path works when posting from a phone.