Compress PNG Online
Optimize PNG images, logos, and UI graphics with transparent lossless compression in your browser.
Drop your image here to compress
Supports JPG, PNG, and WebP up to 25 MB • 100% private in your browser
Zero server upload: Your image never leaves your device
Understanding PNG Compression in Web Browsers
The Portable Network Graphics (PNG) standard relies on lossless DEFLATE compression. Web browsers natively encode PNGs without discarding color fidelity or alpha channel transparency. This makes PNG superior for screenshots, logos, diagrams, and sharp text.
How to Drastically Shrink Large PNGs
Because PNG is lossless, sliding quality controls will not discard pixel data in pure PNG mode. If you have a photograph accidentally saved as a massive 15MB PNG, switching the output format to WebP or JPG will shrink the file down to under 500KB while preserving stunning visual quality.
Frequently Asked Questions
PNG is a lossless specification in HTML5 canvas. The browser does not discard color data when saving as PNG. To achieve dramatic compression on complex images, select WebP or JPG output.