Compress PNG
Smart palette compression keeps transparency and cuts file size. Runs entirely in your browser.
Drop images here
or click to browse · JPG, PNG, WebP · multiple files supported
Images are processed on your device and never uploaded.
Options
How it works
- Drop your PNG files into the box above.
- The tool reduces the color palette intelligently — usually invisible, often 50–80% smaller. Open Options to switch the output to WebP for even smaller files.
- Download the compressed PNGs.
Frequently asked questions
- Are my images uploaded to a server?
- No. All compression happens locally in your browser. Your images never leave your device, which also makes the process instant — there is no upload or download wait.
- Will compressing reduce image quality?
- Compression removes data your eyes barely notice. At the default settings the difference is invisible in normal viewing. You can adjust the quality level under Options if you need finer control.
- Does compression keep transparency?
- Yes. Transparent areas are preserved exactly, both when compressing to PNG and when converting to WebP.
- How can PNG be compressed if it is lossless?
- The tool reduces the color palette to the shades the image actually needs, with careful dithering to hide the transitions. Technically that discards data, but for screenshots and graphics the result is visually identical at 50–80% smaller.
- Should photos be saved as PNG?
- Usually not. PNG excels at graphics with sharp edges and flat colors; for photographs it produces very large files. Convert photos to JPG or WebP instead — the same look at a fraction of the size.
About this tool
PNG is a lossless format: it reproduces every pixel exactly, which makes it ideal for screenshots, logos, diagrams and any graphic with sharp edges or text. The price of that precision is size — a PNG screenshot can easily be five to ten times larger than it needs to be, because it stores far more distinct colors than the image visually contains. Every screenshot you take inherits this overhead, which is why folders of UI captures and documentation images grow so quickly.
This tool shrinks PNGs through palette quantization: it analyzes the image, builds an optimized palette of the colors that actually matter, and maps every pixel to it with careful dithering. For typical screenshots and graphics the result is 50–80% smaller and visually identical. The alpha channel is quantized along with the colors, so soft shadows and anti-aliased edges survive intact. Photographic PNGs shrink too, though photos are fundamentally better served by JPG or WebP.
If the file is destined for a website, consider switching the output to WebP under Options. WebP supports the same kind of transparency as PNG at a fraction of the size, and every modern browser renders it natively. Keep PNG when you need maximum compatibility — email attachments, office documents and older software.
As with every tool on this site, compression happens locally in your browser. Screenshots often contain names, messages and account details, so it matters that nothing is uploaded: the file is processed on your device, and your original stays untouched. Batch processing works too — drop a folder’s worth of files and download each result as it finishes.