PNG compressor
Nothing is uploaded; every file is processed in this browser
PNG is lossless, so a quality slider does nothing to it; the only ways to shrink a PNG are to reduce its dimensions or to convert it to a lossy format. For a photograph saved as PNG, converting to WebP or JPEG typically cuts the file by 80% or more.
How to compress a PNG
The right question for a PNG is usually whether it should be a PNG at all. The format is lossless and was designed for graphics with flat colour and sharp edges — logos, screenshots of interfaces, diagrams, anything needing transparency. A photograph saved as PNG is typically five to ten times larger than the same image as a good JPEG, with no visible benefit. If your PNG is a photograph, the conversion is the compression.
Questions
Because PNG is lossless. Quality only applies when you switch the output format to WebP or JPEG.
Reduce its dimensions, or convert it to WebP, which supports transparency and is usually far smaller.
Yes. It is the natural replacement for PNG where transparency matters and file size does too.
Yes. JPEG has no alpha channel, and transparent areas become solid. Use WebP if you need it.
No. Everything runs in your browser, so there is no upload and no queue.