How to Upscale an Image Without Losing Quality
Why normal resizing makes images blurry, how AI upscaling adds real detail, and which settings to use for web, print and 8K.
Stretch a small image in any editor and it turns soft and blocky. That's because ordinary resizing only spreads the existing pixels out. AI upscaling works differently: it predicts the fine detail that should sit between them, so edges stay sharp and textures look natural.
Resizing vs. AI upscaling
- Bicubic or bilinear resizing averages neighboring pixels. No new detail is created, so a 2× image looks like the original viewed through frosted glass.
- AI upscaling has learned what edges, hair, fabric and text look like at high resolution. It rebuilds those details instead of blurring them.
Pick the right option
On the Image upscaler:
| Need | Option | Credits |
|---|---|---|
| Quick 2× for the web | Fast 2× | 4 |
| Product photos, portraits, prints | Pro 2× | 6 |
| Large prints, posters, up to 8K | Pro 4× | 8 |
If the photo is also blurry or noisy, start with the Photo enhancer instead: it sharpens and doubles the size in one step, and Ultra HD 4K goes straight to print resolution.
Tips for the best result
- Start from the best source you have. Upscale the original file, not a screenshot of it or a copy re-saved many times.
- Upscale once. Running 2× twice is worse than one 4× pass, because artifacts get enlarged.
- Crop first. Cropping before upscaling puts all the pixels where you need them.
- Check text and faces. Upscaling keeps faces the same, but tiny text that was unreadable can't be recovered. For text, use Unblur text.
How big can I print?
At 300 dpi, a 2048 × 1536 image prints at about 17 × 13 cm. After a 4× upscale (8192 × 6144) the same image prints sharp at about 69 × 52 cm.
Is it free?
You can try one image a day without an account. Signed in, you get free daily credits for Fast 2×. Free results are capped at 2048 px with a small watermark; credits give you the full-size file.