Upscale Image 2×, 3× or 4×

How this upscaler works

Enlarging means inventing pixels between the ones you have. The crudest way, nearest neighbour, just copies each pixel into a bigger square — perfect for pixel art, ugly for photos. Smooth interpolation blends neighbouring pixels instead, but done in one big jump it leaves soft, haloed edges. So this tool enlarges in steps of at most 2× using the browser's high-quality resampling filter, then runs an unsharp mask: it compares each pixel with a blurred copy and pushes the difference back, which restores edge contrast without amplifying flat areas (a small threshold leaves skies and skin alone).

Upscaling vs AI upscaling

How much do you need?

For print, pixels = inches × DPI: an 8×10 inch print at 300 DPI needs 2400 × 3000 pixels, and at 150 DPI (fine for posters viewed from a distance) half that. The DPI & print size calculator does the arithmetic, and Change Image DPI writes the DPI value a print shop asks for. To make an image smaller, or an exact size, use the image resizer instead.

Tips for the cleanest result

• Start from the largest, least-compressed copy you have — upscaling a heavily compressed JPG also enlarges its blocks.
• Upscale once to the final size; repeated upscale-and-save rounds soften the image each time.
• Save as PNG if you will edit further, JPG for sharing — at 4× a PNG photo can be very large.
• For a logo that must scale to any size, trace it into a vector with PNG to SVG instead.