Resize Image for Instagram — Complete Size Guide 2026

Q: What is the best image size for an Instagram post?

The ideal Instagram post size is 1080×1080 px for square, 1080×1350 px for portrait, and 1080×566 px for landscape. Always use a 1:1, 4:5, or 1.91:1 aspect ratio.

Q: What size should an Instagram Story be?

Instagram Stories should be 1080×1920 px (9:16 aspect ratio). This fills the full screen on all modern smartphones.

Q: How do I resize an image for Instagram without losing quality?

Use Resizo to resize your image to the exact Instagram dimensions. The tool uses high-quality bicubic interpolation in your browser — no upload needed, no quality loss from server compression.

Instagram Image Sizes 2026

All recommended pixel dimensions for every Instagram content type. Dimensions verified April 2026 Click Use this size to auto-fill the resizer above.

Format	Dimensions	Aspect Ratio	Best For
Post (Square)	1080 × 1080 px	1:1	Feed posts, carousel	Use this size
Portrait Post	1080 × 1350 px	4:5	Max feed real estate	Use this size
Story / Reel	1080 × 1920 px	9:16	Stories, Reels, full-screen	Use this size
Landscape Post	1080 × 566 px	1.91:1	Panoramic / wide shots	Use this size
Profile Picture	320 × 320 px	1:1	Account avatar (displayed 110px)	Use this size

* Instagram compresses images on upload. Always start with the highest-quality source at the recommended dimensions. Use JPG at 85–90% quality for best results.

How to Resize an Image for Instagram

1

Open Resizo and upload your image

Drag and drop, paste from clipboard, or click to browse. Works with JPG, PNG, WebP, and GIF.
2

Enter the Instagram dimensions

Type the width and height from the table above (e.g. 1080 × 1080 for a square post). Unlock aspect ratio to enter both values independently.
3

Choose JPG quality and download

Set quality to 80–90 for Instagram (higher than that offers no visible benefit). Click Download and your file is ready to post.

Start Resizing ?

Frequently Asked Questions

What is the best image size for an Instagram post?

The ideal Instagram post size is 1080×1080 px for square, 1080×1350 px for portrait (4:5), and 1080×566 px for landscape. Portrait posts get the most feed real estate and tend to perform best.

What size should an Instagram Story be?

Instagram Stories should be 1080×1920 px (9:16 aspect ratio). This fills the full screen on all modern smartphones. The same dimensions apply to Reels thumbnails.

How do I resize an image for Instagram without losing quality?

Use Resizo — it applies bicubic interpolation inside your browser so there's no server compression. Set output quality to 85×90 for JPG. Instagram will re-compress the image when uploaded, so starting with a high-quality source is important.

Does Resizo upload my photos to a server?

No. All processing happens in your browser using the HTML5 Canvas API. Your images never leave your device — no server, no cloud, no privacy risk.