Image upscaler

A plain resize spreads the pixels a photo has, so a big enlargement looks soft. The AI model learned from photos made small and soft on purpose next to their sharp originals, so it draws edges and fine texture at the new size.

• 4× makes the photo four times as wide and four times as high.
• 2× is the 4× result made half as wide and high: sharper than enlarging 2× directly.
• The file keeps its format unless you pick another one; PNG keeps every pixel.

The enlarging runs on your device, so the limit depends on it. Photos larger than this are refused with a note, before any work starts.

• Computers with a current Chrome, Edge or Safari: photos up to 2,000 px on the longest side, so up to 8,000 px at 4×. It runs on the graphics chip, which is fast.
• Phones, tablets and browsers without WebGPU: photos up to 800 px on the longest side. It runs on the processor, which is much slower.
• Photos are enlarged one at a time, the others wait their turn.

It adds detail that looks right; it can’t bring back what the photo never showed. Text too small to read stays unreadable, and a face too blurry to recognize stays blurry. For the best result, start from the largest copy of the photo you have.