Generated a cool sci-fi poster with ChatGPT last weekend—loved the design, but when I tried to enlarge it for a frame? Total pixel fuzz. 
ChatGPT’s default 1024x1024 is fine for DMs, but anything bigger (like wallpapers or prints) looks messy.
First tried Gigapixel to fix it—yeah, it upscaled, but you need a subscription, and the interface felt like solving a puzzle. Then I gave HitPaw FotorPea a shot—game-changer, and free to test!
Here’s how easy it was:
Dragged the ChatGPT poster into HitPaw (no sign-up hoops—nice!)
Tapped “Upscale Model” (it auto-fixes blur while boosting resolution)
Slid resolution to 400% (that’s 4K!) and hit “Preview”
Exported—no watermarks, no weird artifacts, just sharp details (even the tiny spaceship windows were clear!)
I even batch-upscaled 3 ChatGPT character designs after that—10 mins tops. Works on Mac/Windows, and you don’t need to be a pro to use it.
Got ChatGPT images that are too small? A social media graphic? A gift poster? Drop which one you’re struggling with—I’ll tell you how to make it crisp! 