Instagram Post Size Resizer
Crop your photo to the best Instagram post size, 1080 × 1350 portrait, and see how it will look on your 3:4 profile grid before you post.
NewFreeNo uploadExact size
1Add your imageJPG, PNG, WEBP · or paste
2Choose platform & size
3Fit & adjust
How to use Instagram Post Size Resizer
- 1
Add your photo
Drop or paste the photo you want to post.
- 2
Choose the post format
Portrait 4:5 is selected. Switch to square, tall 3:4 or landscape if you prefer, and drag to frame it.
- 3
Download
Download a JPG, PNG or WEBP at the exact size, ready to upload.
Instagram post sizes
| Format | Size (px) | Ratio | Notes |
|---|---|---|---|
| Portrait (recommended) | 1080 × 1350 | 4:5 | Takes the most space in the feed |
| Tall | 1080 × 1440 | 3:4 | From the Instagram app; fills the profile grid exactly |
| Square | 1080 × 1080 | 1:1 | Classic post |
| Landscape | 1080 × 566 | 1.91:1 | Smallest in the feed |
The 3:4 profile grid
Instagram's profile grid shows posts as 3:4 tiles. A 4:5 or square post is cropped at the sides on the grid, so keep faces and text in the centre. Turn on the guides to see the grid crop.
Tips
- Use 1080 px wide images; larger images are scaled down by Instagram.
- For carousels, every slide uses the ratio of the first one, so resize them all to the same size.
- Want a seamless multi-post grid? Try the Instagram Grid Maker.
Sources: Sked Social size guide (2026).
Frequently asked questions
What is the best Instagram post size?
1080 × 1350 px (4:5 portrait). It takes the most space in the feed.
Does Instagram still support square posts?
Yes, 1080 × 1080 px works, but the profile grid shows a centred 3:4 crop.
Why are my posts cropped on my profile?
The profile grid uses 3:4 tiles, so the sides of 4:5 and square posts are hidden there.
What is the maximum width?
Instagram displays posts at 1080 px wide; larger uploads are scaled down.
Is my image uploaded?
No. Resizing happens in your browser; your image never leaves your device.
Does resizing reduce quality?
Downscaling keeps images sharp. Upscaling a small image cannot add detail, so start from the largest original you have.