Compress PNG to 500KB

PNG in, PNG out, under 500 kilobytes.

Drop images here

JPG, PNG, WebP, AVIF, GIF, BMP. Paste works too.

Choose images

Stays on your device. Nothing is uploaded.

Large PNG exports from design tools are often several megabytes for no good reason: they store millions of colours an image never uses. Reducing the palette to what is actually there usually takes a file under 500KB while leaving it pixel sharp and still transparent.

Good for

Exports from design tools that came out huge
Full page screenshots
Illustrations and flat artwork
Assets for a site that still need transparency

Questions

Why is my PNG so large to begin with?

PNG stores every pixel exactly and uses 24 or 32 bit colour whether the image needs it or not. A two colour diagram is stored with room for sixteen million.

Is this the same as what pngquant does?

The same idea: build a palette that fits the image, then write an indexed PNG. Hirira does it in the browser so the file never leaves your device.

Can I go smaller than 500KB?

Usually by a lot. Try 200KB or 100KB, or drop the Quality setting, which maps to a smaller palette for PNG.

Also here: Compress Image. Related: Compress Image to 20KB, Compress Image to 50KB, Compress Image to 100KB, Compress Image to 200KB.