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Instagram Square Post Resize
An Instagram square post is the classic 1:1 feed image format at 1080×1080px. It previews in the profile grid without cropping, making it the best choice for a consistent feed layout. While portrait (4:5) and landscape (1.91:1) are also supported, the grid alignment is still based on squares, so 1:1 remains the most stable format. This tool lets you crop rectangular photos to 1080×1080px and save them instantly.
How to use
Adjust position
Adjust the position in the preview.
Save
Run resize and save as JPG.
When to use this tool
Square posts are the classic Instagram format, creating the most consistent grid layout.
Maintaining a uniform square grid layout on your feed
Cropping a rectangular photo into a square for posting
Managing a brand account feed with consistent image dimensions
Instagram Square Post Spec Guide
Recommended sizes as of 2025. Square is the default Instagram post ratio.
| 1080 × 1080px |
| Aspect ratio 1:1 |
| File format: JPG, PNG |
| Images below 1080px are automatically upscaled. |
| Square images preview in the feed grid without cropping. |
| The square ratio is also the most reliable for carousel (multi-image) posts. |
| The full square is displayed as-is in the feed. |
| Aligns in a uniform 1:1 grid on the profile page. |
| Center-aligned text overlays work most effectively. |
| Maximum file size: 30MB (photos) |
| Supported formats: JPG, PNG |
| Recommended resolution: 1080px width or above |
FAQ
Is the square format still the default on Instagram?
Instagram now supports portrait (4:5) and landscape (1.91:1), but the profile grid still defaults to square previews, so 1:1 creates the most consistent layout.
What happens if I upload an image larger than 1080px?
Instagram automatically downsizes it to 1080px. Higher-resolution originals retain better quality after the downscale, so starting above 1080px is recommended.
What is the maximum file size for Instagram posts?
Photos can be up to 30MB. Supported formats are JPG and PNG. For high-resolution photos, use an image compression tool to reduce size before uploading.
Do carousel posts need to be square too?
The first image in a carousel sets the ratio for all subsequent images. Using 1:1 square for all slides ensures every frame displays without cropping.
Should I use JPG or PNG for Instagram?
JPG is smaller and uploads faster, while PNG preserves sharpness for text-heavy or graphic images. Use JPG for regular photos and PNG for designed graphics.