Resize Image for Instagram Post
Resize images to the perfect Instagram post size (1080×1080 or 1080×1350). Ensure maximum quality in the feed. Free, no sign-up.
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Instagram supports three aspect ratios for feed posts: square (1:1 at 1080×1080), landscape (1.91:1 at 1080×566), and portrait (4:5 at 1080×1350). The portrait format at 1080×1350 takes up the most screen real estate in the feed, which is why marketers and creators prefer it for maximum engagement. Our tool pre-fills the 1080×1350 portrait dimensions — upload your image and it's resized instantly in your browser. No account, no watermark, no file uploads to external servers.
Dimensions at a Glance
How to Resize to 1080×1350
- Click "Open Image Resizer" above
- Upload your image (drag & drop or click to browse)
- Set width to 1080 and height to 1350
- Choose your output format (JPG, PNG, or WebP)
- Click Resize and download instantly
Related Image Sizes
Why 1080×1350 Pixels Is the Right Size
The 1080×1350 pixel dimension (4:5 portrait format) serves a specific purpose. Instagram supports three aspect ratios for feed posts: square (1:1 at 1080×1080), landscape (1.91:1 at 1080×566), and portrait (4:5 at 1080×1350). Using this exact resolution prevents platforms from auto-cropping or compressing your image. Upload at 1080×1350 for pixel-perfect display — our tool handles the conversion instantly in your browser.
How to Resize Any Image to 1080×1350
Upload your source image in JPG, PNG, or WebP format and the tool resizes it to exactly 1080×1350 pixels. For portrait images, the tool scales the width to 1080px and adjusts the height accordingly. If the source aspect ratio differs from 4:5, consider cropping first. High-quality bicubic interpolation ensures minimal quality loss, and the total output is 1.46 megapixels — sharp enough for any screen or print application.
Export Options for 1080×1350 Images
After resizing to 1080×1350, choose the output format that matches your needs. JPG is best for photographs — smaller file size with imperceptible quality loss. PNG preserves transparency and is ideal for logos and overlays. WebP delivers the best compression ratio and is recommended for web publishing and social media. Every conversion happens in your browser with no file uploads, no daily limits, and no watermarks.
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Frequently Asked Questions
What's the best Instagram post size in 2026?
The recommended size is 1080×1350 (4:5 portrait). This takes up the maximum vertical space in the feed, increasing visibility and engagement compared to square or landscape.
Can I also use square images on Instagram?
Yes. Square posts (1080×1080) still work perfectly. The tool can resize to either format — just adjust the dimensions.
Does Instagram compress uploaded images?
Yes, Instagram re-encodes all uploads. Starting with a 1080px-wide image at high quality minimizes the visible compression artifacts Instagram introduces.
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