What this tool is for
Instagram supports three carousel aspect ratios, and they don't all behave the same way. The same design renders differently in the feed than on your profile grid, the first slide locks the format for every other slide, and Portrait carousels lose ~34 pixels off each side when displayed in the grid. This tool lets you pick a format, drop in up to 20 slides, see them auto-cropped to spec in a phone preview, watch the profile-grid crop applied live, and download every slide as a PNG at the exact pixel size Instagram expects.
The three valid sizes
| Portrait — feed (recommended) | 1080 × 1350 px (4:5) |
| Portrait — grid crop | 1012 × 1350 px (~3:4) |
| Square | 1080 × 1080 px (1:1) |
| Landscape | 1080 × 566 px (1.91:1) |
| Max slides | 20 |
| Supported formats | JPG, PNG, HEIC |
| Max file size per slide | 30 MB |
Which format should you pick?
- Portrait (1080×1350) — recommended for most posts. Takes up the most vertical space in the feed, which is where most views happen. Trade-off: profile-grid crop slices ~34px off each side.
- Square (1080×1080) — safe default. No crop surprises in the grid. Slightly less feed real estate than Portrait.
- Landscape (1080×566)— only when you're repurposing wide imagery (event photos, YouTube thumbnails, product shots already shot wide).
How to use it
- Pick a format. If unsure, start with Portrait — it is what most creators ship.
- Drop in up to 20 slides. Each gets auto cover-fit to the chosen aspect ratio.
- Drag thumbnails to reorder. Slide 1 is the hook, the last slide is the CTA.
- Use the phone-mockup arrows to swipe through and verify continuity.
- Toggle the profile-grid crop overlay on Portrait to confirm titles and faces stay inside the visible area.
- Download all slides as a ZIP — every PNG arrives at exact spec, ready to upload.
Design notes that matter
- Slide 1 has to earn the swipe — make it the most provocative line, not a title card.
- Visible swipe affordance on slides 1–9. Keep it inside the right ~80px so it survives the grid crop.
- Last slide is a CTA: save, share, follow, or click. Skip thank-you cards.
- 7–10 slides is the sweet spot for most narratives. Drop-off after slide 5 is steep.
Related
Posting Stories or Reels too? Instagram Story Size guide or Instagram Story Safe Zone Checker.
Sized your slides — now design them
This tool gets the dimensions right. Carousel Maker handles the rest: AI-generated copy from a single prompt, 100+ professional templates, drag-and-drop editing, and PDF/PNG export with no watermarks.