Part of:Lossless vs Lossy: What Image Formats Mean by It
Compress PNG Files
Compress PNG in your browser with lossless or palette 256 or 64 colors. Shrink screenshots icons and illustrations without losing sharpness.
- No file limits
- No registration
- Free forever
- Images never leave your browser
Drop images here
or paste from clipboard (Ctrl/⌘ + V)
Supported formats: JPG, PNG, WebP, AVIF, SVG
Original Size
Output Size
Target size
Processing…
Your images never leave your browser
All processing happens locally on your device. Nothing is uploaded to a server, stored, or tracked.
Shrink PNGs, screenshots and illustrations via lossless compression or palette quantization. Lossless keeps every pixel, palette 256 merges similar colors for smaller files.
How it works
Why compress PNG?
Shrink PNGs, screenshots and illustrations via lossless compression or palette quantization. Lossless keeps every pixel, palette 256 merges similar colors for smaller files.
How PNG compression works
PNG is a lossless format, so compression keeps every pixel while optimizing how the data is stored. Higher quality settings preserve more detail but produce larger files.
Quality settings explained
The lossless preset balances quality and file size for most uses. Lower quality settings cut size further but introduce more compression artifacts.
Is compression private?
Your PNG is compressed locally in your browser. Palette quantization and lossless passes all happen on your device.
Batch compress PNG
Shrink a group of PNG images together, screenshots, icons and illustrations. Free, private, batch ZIP, with nothing uploaded to any server.
Frequently asked questions
Why is my PNG already large?
PNG stores every pixel losslessly, so files are large. Quantizing colors to 256 or 64 can cut size dramatically while keeping sharpness.
Lossless or palette 256 for a screenshot
Lossless keeps sharp text perfect, palette 256 is often smaller and still looks clean. Try lossless first, then 256 if you need smaller. For an even smaller transparent alternative try PNG to WebP for smaller.
Can I bulk compress many PNGs without uploading
Yes. Add your PNGs, pick lossless or 256, and compress together. All processing happens locally in your browser and you can download a ZIP.