Compress PNG
Shrink PNG file size while keeping transparency — private, in your browser
Make PNG files smaller without losing transparency
PNG is a lossless format, which is exactly why PNG files are often so heavy — a single screenshot or export can run to several megabytes. Simply re-saving a PNG barely helps, because there is no quality dial to turn. The real win comes from reducing the number of colors the image stores (palette quantization), the same approach desktop tools like pngquant use. For logos, icons, screenshots and flat illustrations, that shrinks the file by 60–80% while staying visually almost identical — and the transparency is preserved.
Drop one PNG or a whole batch, slide the colors control until the preview still looks right, and watch the before/after size update live. Download a single compressed PNG or a ZIP of the lot. Nothing is uploaded.
How to compress a PNG
- Drop your PNG files into the box above (or click to choose them).
- Drag the Colors slider down — fewer colors means a smaller file.
- Watch the live preview and the before/after size readout to find the sweet spot.
- Click Download compressed PNG (or Download all (ZIP) for a batch).
When PNG compression works best
Great for graphics with flat color
Logos, icons, UI screenshots, diagrams and illustrations use a limited palette, so cutting colors barely changes how they look while slashing the file size.
Transparency stays intact
The compressed PNG keeps its alpha channel, so a logo on a transparent background stays transparent — ready to drop onto any design.
Photos? Consider WebP or JPG instead
Photographic PNGs have thousands of subtle colors and compress less. For photos, converting to WebP or JPG usually saves far more at the same quality.
Frequently Asked Questions
Are my PNG files uploaded anywhere?
No. Compression runs entirely in your browser — your PNG files never leave your device.
How does PNG compression work here?
PNG is lossless, so ordinary re-saving barely changes the size. This tool reduces the number of colors (palette quantization) — the same technique pngquant uses — which shrinks the file dramatically while keeping it visually close to the original.
Will transparency be preserved?
Yes — the compressed PNG keeps its alpha transparency, so logos and icons with see-through backgrounds stay transparent.
How small can it get?
Screenshots, logos and flat graphics often drop 60–80%. Photographic PNGs compress less; for photos, WebP or JPG usually saves more.
Can I compress several PNGs at once?
Yes — add multiple files and download them all as a single ZIP of compressed PNGs.