Story Format / Instagram Post

Instagram Post Resizer

Resize any image or video for Instagram feed posts (1080×1350) — free, instant, private.

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Drop a file here or click to upload
Images (JPG, PNG, WebP) or Videos (MP4, MOV, WEBM) — max 500 MB
Converting…
Download Post
⚡
Instant
Runs in your browser — no upload to servers
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Private
Files never leave your device
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1080×1350
Optimal 4:5 Instagram feed post size
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Images & Video
JPG, PNG, WebP, MP4, MOV, WEBM

What is Instagram Post format?

Instagram feed posts display best at 1080x1350 pixels in a 4:5 portrait aspect ratio. This vertical format takes up the maximum amount of screen space in the Instagram feed, increasing engagement and visibility compared to square or landscape posts. Instagram supports images from 1:1 to 4:5, but the 4:5 ratio occupies the most feed real estate, making your content harder to scroll past.

How to resize for Instagram posts

  1. Upload your image or video — JPG, PNG, WebP, MP4, MOV, or WEBM.
  2. Choose "Fit + Black Bars" to show your entire image, or "Stretch to Fill" to cover the full 1080x1350 frame.
  3. Download the resized file and post it directly to your Instagram feed.

Why use Story Format?

Story Format is a free, browser-based resizer built for speed and privacy. Unlike other tools, your files are never uploaded to any server — all processing happens locally in your browser. There's no sign-up, no watermark, and no limit on how many files you can convert. It supports both images (JPG, PNG, WebP) and videos (MP4, MOV, WEBM) with audio preserved.

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