Compress PNG
Smaller PNGs that keep their transparency
Runs in your browser. Files never leave your device.
How to use Compress PNG
- Choose or drop your images. You can add several at once.
- Adjust the settings and check the preview.
- Download the result, or every file at once as a ZIP.
About this tool
PNG files are made smaller by reducing them to a palette of up to 256 carefully chosen colors. Transparency is preserved, and for screenshots, logos and illustrations the change is usually invisible.
If you need every pixel to stay exactly the same, choose lossless mode: the file is then optimized without changing any colors.
- Works on your device. Nothing is uploaded.
- Free, with no sign-up and no watermark.
- No limits on file count or size beyond what your device can handle.
Questions and answers
Does PNG compression keep transparency?
Yes. Transparent and semi-transparent pixels are kept in the palette.
Why is my PNG photo still large?
PNG is a lossless format meant for graphics. For photos, converting to JPG or WebP gives much smaller files.
Is Compress PNG free?
Yes. Every tool on ImgImage is free to use, with no sign-up, no watermark and no limit on how many files you process.
Are my files uploaded anywhere?
No. Your files are processed by your own browser and never leave your device. Nothing you open here is sent to a server.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers. Large files are processed faster on a computer.