What is the best image size for an Instagram post?

1080 x 1350 px (4:5 portrait) is the best size for feed posts because it takes up the most vertical space in the feed, which increases visibility and engagement.

Will Instagram compress my image even if I upload the right size?

Instagram applies its own compression on upload. Starting with a correctly sized, high-quality file minimizes the impact of that compression.

Can I resize multiple images for a carousel?

Yes. Resize each slide to the same dimensions (e.g., 1080 x 1080 or 1080 x 1350) and use a consistent aspect ratio so the carousel scrolls smoothly.

How to Resize an Image for Instagram

4 min readImage

Instagram displays images at very specific dimensions. Upload the wrong size and your photo gets cropped, compressed, or pillarboxed. This guide covers every Instagram format — posts, stories, reels covers, and profile pictures — and shows you how to resize accurately so your content looks sharp on every device.

Quick Steps

1
Open the tool
Go to Resize for Instagram on Toolin.
2
Upload
Drop your image into the tool.
3
Pick a format
Select Square, Portrait, Story, or Profile.
4
Frame your subject
Drag to position the image within the crop.
5
Download
Save and upload to Instagram.

Resize for Instagram

Resize images to perfect Instagram dimensions

Open Tool

Instagram Image Size Cheat Sheet

Square post: 1080 x 1080 px (1:1 ratio)
Portrait post: 1080 x 1350 px (4:5 ratio) — takes up the most feed space
Landscape post: 1080 x 566 px (1.91:1 ratio)
Story / Reel: 1080 x 1920 px (9:16 ratio)
Profile picture: 320 x 320 px (displayed as a circle)
Carousel: 1080 px wide, consistent ratio across all slides

Why Correct Sizing Matters

When you upload an image that does not match Instagram's expected dimensions, the platform either auto-crops it or compresses it aggressively. Both scenarios can cut off important parts of your image or introduce visible artifacts. By resizing to the exact dimensions before uploading, you retain full control over what your audience sees.

Resize for Instagram with Toolin

Open the Resize for Instagram tool

Navigate to the Instagram Resize tool on Toolin.

Upload your image

Drop your photo into the upload area.

Select the Instagram format

Choose from presets like Square Post, Portrait Post, Story, or Profile Picture. The tool sets the correct dimensions automatically.

Adjust framing

Drag or reposition your image within the frame to control what is visible after resizing.

Download

Save the resized image and upload it directly to Instagram.

Pro Tips for Instagram Images

Use the 4:5 portrait ratio for feed posts — it occupies more screen real estate than square, increasing engagement.
Design stories at 1080 x 1920 and keep text and stickers within the center safe zone to avoid being covered by the UI.
Export at the highest quality your format allows; Instagram will compress further on upload.
Preview your grid layout before posting to ensure visual consistency across your profile.

Try Resize for Instagram Now — Free, No Sign-up

Frequently Asked Questions

What is the best image size for an Instagram post?: 1080 x 1350 px (4:5 portrait) is the best size for feed posts because it takes up the most vertical space in the feed, which increases visibility and engagement.
Will Instagram compress my image even if I upload the right size?: Instagram applies its own compression on upload. Starting with a correctly sized, high-quality file minimizes the impact of that compression.
Can I resize multiple images for a carousel?: Yes. Resize each slide to the same dimensions (e.g., 1080 x 1080 or 1080 x 1350) and use a consistent aspect ratio so the carousel scrolls smoothly.