Compress PNG Online
Lossless PNG optimization, processed on your device.
Runs on your devicePNG
At a glance
- Input:
- PNG
- Output:
- Optimized PNG files
- Processing:
- Runs locally in your browser
- Limits:
- Up to 60 MB per file, max 10 files
- Privacy:
- Your files stay on your device — nothing is uploaded to a server
About this tool
Optimize PNG files without sacrificing a single pixel. When the format itself is the bottleneck, the tool tells you honestly and points you to the conversion options that will actually help.
How to use it
- Add one or more .png files.
- Keep PNG for lossless output, or switch output to WebP for stronger savings.
- Process and download.
Good to know
- Lossless mode cannot guarantee savings for every file — already-optimized PNGs may stay the same size.
Frequently asked questions
Is PNG compression lossless?
Yes — keeping PNG output re-encodes the image without changing any pixels. Savings vary because browser encoders differ from the original encoder.
Why did my PNG barely get smaller?
PNG is already compressed internally, and some files are near-optimal. For big savings with screenshots and graphics, try the WebP Compressor — WebP typically beats PNG by 20–30%.
Where are my files processed?
Entirely on your device — PNG compression runs inside your browser tab and nothing is uploaded.