Compress PNG
Reduce PNG size without noticeable quality loss. Directly in your browser.
- One file at a time
- Size — up to 50 MB
- Processing in the browser, file is not uploaded
About PNG compression
PNG is a lossless format, but files are often large. Compression via color quantization reduces size by 2-5 times while preserving visual quality.
Our tool compresses PNG directly in your browser using the UPNG.js library. It works like pngquant: reduces the number of colors in the palette. Files are not uploaded to the server.
What the tool can do
- Quantization: reducing palette to 256 colors.
- Setting: slider for number of colors.
- Transparency preservation: alpha channel is not lost.
- Privacy: files are not uploaded to the server.
- No visible quality loss at 128-256 colors.
How to use
- Drop the PNG file.
- Adjust the number of colors with the slider.
- Click "Compress PNG".
- Compare sizes and download the result.
Frequently asked questions
How does PNG compression work? Color quantization is used — the palette is reduced to 2-256 colors. This reduces file size without visible quality loss.
How many colors to choose? For photos — 256. For logos and icons — 64-128. For simple graphics — 16-32.
Is transparency preserved? Yes. The alpha channel is preserved, transparent areas remain transparent.
Is it safe to use? Yes. Everything happens in the browser, files are not uploaded to the server.