About the PNG Image Compressor
PNG files are lossless, which is great for quality but often results in large files, especially for screenshots and graphics with gradients. The PNG Image Compressor uses color quantization, the same technique used by popular tools like TinyPNG, to reduce the number of colors in your image to a carefully chosen palette. The result is usually 50–80% smaller while looking nearly identical, and transparency is fully preserved.
Use the color quality slider to control the palette size: higher values keep more colors and subtle gradients, lower values give the smallest files. Setting it to 100% keeps the image lossless and only optimizes the PNG encoding. You can compress many PNGs at once and download them as a ZIP, all processed privately in your browser.
How to use the PNG Image Compressor
- Drop one or more PNG images into the upload area.
- Adjust the color quality slider and optional maximum width.
- See the new size and percentage saved for every file.
- Download images one by one or all together as a ZIP.
Frequently asked questions
Will my PNG keep its transparent background?
Yes. The compressor keeps the alpha channel, so transparent and semi-transparent areas stay intact.
Why is my compressed PNG still large?
Photos stored as PNG compress poorly. Convert them to JPG or WEBP with our PNG to JPG or PNG to WEBP converters for much smaller files.
What does color quality mean?
It controls how many colors are kept in the palette. 100% is lossless; around 60% gives a 256-color palette that looks great for most graphics and screenshots.
