Resize Image for Instagram Posts, Stories, and Reels
Instagram's algorithm rewards correct dimensions. Upload at the wrong size and it gets compressed twice. Hit the exact pixel target and your photos stay sharp.
Instagram has four standard sizes: 1080x1080 (square feed posts), 1080x1350 (4:5 portrait posts — the most engagement-friendly format), 1080x566 (landscape posts), and 1080x1920 (Stories/Reels). Hitting these exact dimensions means Instagram does less processing on upload.
Open Image ResizerStep-by-step
Decide your post type
Square post: 1080x1080. Portrait (recommended for engagement): 1080x1350. Landscape: 1080x566. Story or Reel: 1080x1920.
Open the Image Resizer
Launch the tool below.
Set custom dimensions
Enter the width and height for your chosen Instagram format. Lock the aspect ratio if you want to avoid stretching, or unlock it to crop.
Download and post
Save the resized image. Upload to Instagram directly without further editing. The image will display crisp and Instagram won't re-crop it.
Ready to try it?
Resize images to exact dimensions. Free, no signup, runs in your browser.
Open Image ResizerFrequently asked questions
What is the best size for Instagram in 2026?
1080x1350 (4:5 portrait) is the highest-engagement format because it takes up the most vertical screen space in the feed without being cropped. For Stories and Reels, 1080x1920 is the standard.
Why does Instagram crop my photos?
If your image's aspect ratio doesn't match one of Instagram's supported ratios (1:1, 4:5, 1.91:1 for posts; 9:16 for Stories), Instagram crops to fit. Resizing to a supported ratio first prevents unwanted crops.
Can I upload images larger than 1080 pixels?
Yes, up to 1440 pixels wide for posts. Instagram will downsize anyway, but starting at 1080 means less compression on upload. Going larger doesn't improve final quality.
What about Instagram carousel posts?
All images in a carousel must be the same aspect ratio. Pick one (1:1, 4:5, or 1.91:1) and resize every image in the carousel to match before uploading.
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