Compress a PNG image in the browser and compare the original and compressed file sizes.
Try an example
Load a ready-made sample into this tool and run it. Every result you see is calculated live by the tool itself — nothing here is a pre-written answer.
Sample: File: sample-transparent.png
How to Use
- Choose a PNG file (up to 10 MB).
- Click Run.
- Compare sizes, then download the smaller file.
Compress PNG files without losing quality
This PNG compressor re-encodes a PNG image in your browser and shows the original and compressed file sizes side by side before you download. PNG compression here is lossless, which means the pixels come out identical to the original: the saving comes from more efficient encoding, not from removing detail or flattening transparency. Transparency and sharp edges survive the process untouched.
Best for graphics, logos and screenshots
PNG files are often heavier than they need to be because editors save them with inefficient settings, embedded extras or unoptimized encoding. Logos, icons, interface screenshots and diagrams with flat colors tend to benefit most, and because nothing is lost, the compressed file is a safe drop-in replacement for the original anywhere it is used.
Good to know
An already-optimized PNG may shrink very little, sometimes barely at all, because there is no waste left to remove. That is a property of lossless compression, not a failure: the tool reports the honest sizes either way, so you can keep whichever file is smaller.
Frequently asked questions
Will compressing a PNG make it look worse?
No. The re-encoding is lossless, so the downloaded PNG has exactly the same pixels as the original, transparency included. For a much smaller file at some quality cost, converting to JPG or WebP would shrink it further.
Why did my PNG only shrink a little?
Some PNGs are already saved efficiently, especially files exported by tools that optimize on save. Lossless compression can only remove redundancy, and a well-made PNG has little left. The size comparison shows the honest result either way.
Are my images uploaded anywhere?
No. Files are processed in your browser and never sent to the site's server. Your PNG is decoded and re-encoded on your own device, and the download is generated by your browser.
How to use PNG Compressor
- Choose a PNG file (up to 10 MB).
- Click Run.
- Compare sizes, then download the smaller file.
Limitations
PNG compression here is lossless re-encoding; already-optimised PNGs may shrink very little. Files are processed in your browser and never sent to the site's server.