Compress PNG

No. Selection, decoding, compression, preview, and download all happen locally in your browser. The downloaded copy is newly encoded and does not preserve ancillary PNG metadata.

Yes. Keep PNG re-encodes and optimizes the PNG without changing its pixel values or dimensions. This can remove inefficient encoding, but it cannot guarantee a large saving.

Yes. Both PNG and WebP output preserve the alpha channel. Keep PNG when the receiving service specifically requires PNG or when exact pixel reproduction matters.

Choose WebP for websites or apps that accept it when a much smaller file is more important than lossless PNG output. WebP uses a fixed lossy quality setting here, so compare the preview before downloading.

No. A PNG that is already well optimized may shrink only slightly or can even become larger after re-encoding. Compare the before and after sizes and keep the original when it is smaller.

No. This tool has no target-KB field or quality slider and keeps the original pixel dimensions. Use Resize Image first if reducing width and height is acceptable.

The tool accepts static PNG files only, up to 20 images per batch and 50 MB per file. Images are also limited to 60 megapixels and 16,384 pixels per edge. Animated PNG is rejected, and results are downloaded individually rather than as a ZIP.