The Image
Nothing is uploadedResult
LiveWhat Actually Shrinks A File
How it worksMost oversized images are oversized for one of four reasons.
Pixels first
File size grows with area, not width. Halving both sides cuts the pixel count to a quarter before any compression happens.
Half the sides = 1/4 the pixels
WebP beats JPEG
At the same visual quality WebP usually lands 25 to 35 percent smaller. Every current browser reads it.
Same look, ~30% less
Quality below 70 shows
Between 100 and about 80 the eye sees almost nothing. Below 70 edges and gradients start to band.
Sweet spot 78–85
PNG is for flat art
PNG is lossless, so photographs balloon. Keep it for logos, screenshots and anything that needs transparency.
Photos → WebP, logos → PNG
Questions
03Is my image uploaded anywhere?
No. It is read into this page and processed on a canvas. Nothing leaves your device and nothing is stored.
Can I make an image bigger?
You can, but the browser only interpolates — it invents no detail. Enlarging past about 150 percent looks soft.
Why did PNG get bigger?
PNG stores every pixel exactly. For photographs that is far more data than JPEG or WebP need.