App screenshots
Flat interface colors often leave room for lossless savings. Results vary by how the file was exported.
Compress PNG images
Make PNG files smaller without losing quality. Automatic settings, original dimensions, and transparency preserved.
Drop images here
Or choose them from your device. You can also paste with Ctrl+V.
PNG · Up to 50 images at a time
Selecting images doesn't upload them. They're processed on your device.
How to compress PNG images
- 1Choose PNG images.
- 2Click Compress for automatic lossless optimization.
- 3Download individual images or the whole batch.
Additional settings are optional. You only need them if you want lossy compression.
Want an even smaller file?
Open Additional settings and choose Smaller file — lossy. It reduces the number of colors, which can shrink PNGs much further but changes pixels: gradients and fine details may look different. It’s optional and never switched on for you.
Examples
Results vary by image.
Exports from design tools
Files saved with extra metadata or inefficient settings can usually be stored more compactly without changing a pixel.
Already optimized files
If a PNG was compressed before, we may find no further savings. Your original is kept, never replaced by a larger file.
Questions
Is PNG compression really lossless?
Yes, in automatic mode. We store the same pixels more efficiently. Every pixel, the dimensions, and transparency stay exactly the same. After optimizing, each file is decoded again and compared with the original; if anything differs, the result is rejected.
Why didn’t my file get smaller?
Some PNGs are already saved efficiently. When we can’t reduce a file, we show “No further savings found” and keep your original. That doesn’t mean no smaller version could exist — just that this tool couldn’t find one without changing pixels.
Can I get a smaller file with lossy compression?
Often, yes. In Additional settings, choose Smaller file — lossy and pick how many colors to keep. Colors and gradients may change, so compare the result before downloading.
Are my images uploaded?
No. Images are processed in your browser on your device and never uploaded.