Compress PNG Images Online - Free
Compress PNG images online for free. Reduce PNG file size while preserving transparency and quality. 100% browser-based.
Upload files
or drag and drop files here
Max file size: 50MB
Your files are processed locally in your browser. Nothing is uploaded to any server.
How to Compress PNG Images
Upload PNG Files
Select your PNG images by dragging them in or browsing. Works with all PNG files including transparent ones.
Set Compression Settings
Choose your compression level. The tool optimizes PNG encoding while preserving transparency and visual quality.
Download Optimized PNGs
Save your compressed PNG files. Transparency is fully preserved with significantly reduced file sizes.
Frequently Asked Questions
Can PNG compression preserve transparency?
Yes, PNG compression fully preserves the alpha channel and all transparency data. The compression works by optimizing how pixel data is encoded and filtered without removing transparency information. Your logos, icons, and overlay graphics will maintain their transparent backgrounds perfectly.
How is PNG compression different from JPG compression?
PNG uses lossless compression by default, meaning no pixel data is discarded. JPG uses lossy compression that permanently removes data to achieve smaller sizes. PNG compression works by finding more efficient ways to encode the same data, while JPG compression works by discarding visual details.
Why are PNG files larger than JPG files?
PNG preserves every pixel exactly through lossless compression, which limits how small files can get. JPG achieves smaller sizes by discarding visual information humans typically cannot notice. For photographs, JPG is more efficient. For graphics, logos, and screenshots with sharp edges, PNG is preferred.