How to Upscale an Image Without Losing Quality
Normal resizing stretches pixels and makes images soft. An AI upscaler rebuilds edges and texture, so a small image can be enlarged 2x or 4x and still look sharp. Use 2x for photos that are almost big enough and 4x for small or compressed images.
Why images get blurry when you enlarge them
A 500 pixel wide image only contains 500 columns of information. When you stretch it to 2000 pixels, regular resizing invents the missing pixels by averaging neighbours, which produces soft edges and smudged texture.
Compression makes it worse. Images saved from chats and social apps have often been compressed several times, which adds blocky artifacts that also get enlarged.
What an AI upscaler does differently
An upscaling model has learned what sharp edges, hair, text and textures typically look like. Instead of averaging, it predicts plausible fine detail and removes compression noise at the same time.
The result is not the original high resolution photo recovered from nowhere. It is a sharper, cleaner reconstruction that looks far better than stretching.
Upscale in SleekCut
1. Open the Image Upscaler and drop your image.
2. Choose 2x or 4x. The panel shows the exact output size before you start.
3. Press Upscale. Large images are processed in tiles with a progress bar; on devices with WebGPU the graphics chip does the work.
4. Drag the compare slider over the image to see the difference, zoom in, then download.
2x or 4x?
Use 2x when the image is close to the size you need, for example a 1000 pixel photo you want at 2000 for a print or a banner.
Use 4x for small images, thumbnails, old phone photos and screenshots. Results are capped at about 16 megapixels so they work on phones too; very large photos are scaled to fit that limit first.
What upscaling cannot do
It cannot read a licence plate or a face that is only a few pixels wide. Any detail it adds is a prediction, so do not use upscaled images as evidence or for identity documents.
Strong motion blur and out of focus photos improve less than small or compressed ones.
Best uses
Product photos from suppliers that are too small, artwork for prints, old family photos, images for presentations and banners, and screenshots that need to look crisp on a large screen. After upscaling, use Compress Image if the file is too large to upload.