Steps
Render the pages
Choose the PDF. The format is set to PNG and the resolution to 300 dpi, so text and lines are rendered with plenty of detail before scaling. Leave Pages blank for all pages, or type a range such as 1-8. Press Convert to images, then Use all pages to send every page on.
Fit the pages to the carousel shape
The size is set to 1080 × 1350 (4:5) with Fit inside, so the whole page is kept and any gap is filled with the background colour (white by default). The buttons switch to 1080 × 1440 for a taller 3:4 post or 1080 × 1080 for square; choose Crop to fill if your slides already have that shape. Press Download.
Save as JPEG
Each slide is saved as a JPEG at quality 90, which keeps small text clean. Press Download all.
Download one ZIP
Create the ZIP. The file names keep the page numbers, so the slides stay in order when you add them to the post.
Requirements and sources
| What | Value | Source |
|---|---|---|
| Instagram - photo width kept | When you share a photo that has a width between 320 and 1080 pixels, we keep that photo at its original resolution as long as the photo's aspect ratio is between 1.91:1 and 3:4 (a width of 1080 pixels with a height between 566 and 1440 pixels). | Instagram Help Center - What is Instagram image resolution? / aspect ratios Last verified 2026-10-22 |
| LinkedIn - supported image file types (desktop) | GIF, JPEG, PNG, WEBP | Media file types supported on LinkedIn - LinkedIn Help Last verified 2026-10-22 |
| LinkedIn - maximum image resolution | The maximum resolution for images is 36 mega pixels. | Media file types supported on LinkedIn - LinkedIn Help Last verified 2026-10-22 |
| LinkedIn - document posts (PDF) | The file size cannot exceed 100 MB. The page limit is 300 pages. | Media file types supported on LinkedIn - LinkedIn Help Last verified 2026-10-22 |
FAQ
What size are carousel images?
1080 pixels wide. 1080 × 1350 (4:5) is the common portrait size; Instagram's help centre says it keeps photos up to 3:4, which is 1080 × 1440.
Can I post the PDF itself on LinkedIn instead?
Yes. LinkedIn also accepts PDF documents up to 100 MB and 300 pages, according to its help centre. These images are for posts made of photos, and for Instagram, which does not take PDFs.
Why are the pages rendered at 300 dpi first?
Rendering large and then scaling down to 1080 pixels gives sharper text than rendering straight at 1080 pixels.