Question 1

How do I compress a PNG without losing quality?

Accepted Answer

Upload your PNG, then choose the color depth (256, 128, 64, or 16 colors). Fewer colors means smaller file size. For screenshots and graphics with flat colors, 64-128 colors is usually visually identical. For photos in PNG format, use a higher color count.

Question 2

Can I compress multiple PNG files at once?

Accepted Answer

Yes. Drag and drop multiple PNG files and every image will be compressed with the same color-depth setting, showing per-image savings. Download each compressed file individually.

Question 3

Are my PNG images uploaded anywhere?

Accepted Answer

No. All PNG compression happens entirely in your browser using Canvas and color-quantization. Your images never leave your device.

Question 4

Why does reducing colors make PNG smaller?

Accepted Answer

PNG uses lossless DEFLATE compression. When you reduce the color palette, each pixel needs fewer bits to store (e.g., 16 colors = 4 bits/pixel vs 24 bits/pixel for full color). Less data means better DEFLATE compression and a smaller file.