Resize AI Image Online — GPT Image 2, Midjourney, DALL-E
Resize AI-generated images from GPT Image 2, ChatGPT, DALL-E, Midjourney, or Nano Banana to Instagram, Twitter, Facebook, YouTube dimensions.
Upload files
or drag and drop files here
Max file size: 50MB
Your files are processed locally in your browser. Nothing is uploaded to any server.
How to Resize AI-Generated Images
Upload AI Image
Drop in any AI-generated PNG or JPG from GPT Image 2, OpenAI ChatGPT, Midjourney, DALL-E, or Nano Banana Pro.
Choose Target Size
Pick a social media preset — 1080x1080 Instagram, 1200x630 OG card, 1500x500 X/Twitter header — or set custom dimensions.
Download Resized Image
Crop and download. Upload the result directly to your target platform with no cropping surprises.
Frequently Asked Questions
Will resizing lose quality on AI-generated images?
Downscaling from 2K or 4K GPT Image 2 output to 1080px is effectively lossless — you're discarding pixels the target platform would throw away anyway. Upscaling from small output is where quality suffers, so always generate GPT Image 2 renders at the highest resolution OpenAI supports.
What size should I render in GPT Image 2 for Instagram?
Generate at 2048x2048 in GPT Image 2 then crop to 1080x1080 for Instagram posts, 1080x1350 for 4:5 portrait posts, or 1080x1920 for Stories and Reels. The extra pixels give you cropping flexibility without regenerating in OpenAI.
Does this work for Midjourney and DALL-E outputs too?
Yes. The resize tool handles any image regardless of source. PNG from GPT Image 2, WebP from Nano Banana Pro, JPG from Midjourney — all work identically. Your original file is not sent anywhere.