Compress PNG File Size
Shrink your PNG files while preserving transparency and sharp edges.
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How to Compress PNG File Size
- 1
Upload your PNG
Select a PNG file — logos, screenshots, graphics, or photos with transparency all work.
- 2
Adjust compression level
The default 80% quality works well for most PNGs. For screenshots with text, try 90%. For decorative graphics, 70% is usually fine.
- 3
Download the optimized PNG
The compressed PNG keeps its transparency layer. Check the file size reduction shown on screen.
Why PNG Files Are So Large
PNG uses lossless compression by default, which means it keeps every single pixel exactly as-is. Great for quality, terrible for file size. A simple screenshot with a lot of text can easily be 2-5MB as a PNG, while the same image as a JPG would be 200KB.
The format excels at graphics with sharp edges, flat colors, and transparency — logos, icons, UI elements, diagrams. But people often save photos as PNG too, which balloons file sizes for no real benefit. If your PNG doesn't use transparency, consider converting to JPG instead.
This compressor reduces PNG color palettes intelligently. A 24-bit PNG with 16 million possible colors rarely uses more than a few thousand. By quantizing the palette down, the compressor achieves 50-80% size reduction on typical graphics while maintaining visual fidelity.
Frequently Asked Questions
Will compression remove my PNG's transparency?
No. The alpha channel is preserved during compression. Your transparent backgrounds, semi-transparent overlays, and gradient masks stay intact.
Why is my PNG screenshot 5MB?
Screenshots at high-DPI displays (like Retina) can be 3840x2160 or larger. At that resolution, PNG's lossless encoding stores a lot of data. Compressing with this tool typically brings a 5MB screenshot down to 1-2MB.
Is PNG compression different from JPG compression?
Fundamentally, yes. JPG compression discards visual data permanently. PNG compression reduces the color palette and optimizes the encoding, but can get closer to lossless results. The trade-off is that PNG files are still larger than JPGs at equivalent visual quality.