Why PNG files are large
PNG uses lossless compression — it never throws away pixel data, which is great for screenshots, illustrations and logos. But the trade-off is large file sizes, especially for photos.
A PNG can sometimes become smaller after it is re-encoded, especially when unnecessary metadata is removed. But browser-based PNG re-encoding cannot guarantee a smaller file, so PixlFits preserves an original PNG rather than downloading a larger replacement.
Three ways to compress a PNG
Lossless PNG re-encoding. It keeps PNG pixels and transparency intact, but the final size can be smaller, similar, or larger depending on the original file.
Convert to WebP. WebP often makes screenshots and web graphics smaller while retaining transparency. Use the WebP output option when its browser support fits your destination.
Resize large images first. Reducing pixel dimensions is often the most reliable way to lower the size of a very large PNG.
PNG compression — common scenarios
Screenshots: Try WebP or resize the image when its size matters more than preserving the PNG format.
Logos and icons: Stay with PNG or test WebP carefully; sharp edges and transparency matter more than a specific percentage saving.
Illustrations with transparency: PNG and WebP both retain transparent backgrounds. Compare the output before publishing.
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Open PNG Compressor →Frequently asked questions
How do I compress a PNG without losing quality?
Choose PNG output to retain its pixels and transparency. Re-encoding can remove metadata but cannot guarantee a smaller file; PixlFits keeps an original PNG if re-encoding would make it larger. Try WebP when a smaller file is more important than retaining PNG.
Why is my PNG so large?
PNG never throws away data. A 4000×3000 photo saved as PNG can easily be 20+ MB. PNG is best for screenshots, illustrations and logos — for photos, use JPG or WebP.
Can I compress a PNG and keep transparency?
Yes. PNG and WebP both support a transparent background. JPG does not. PixlFits's compressor keeps the alpha channel when you choose PNG or WebP output.
Is the PNG compression free?
Yes, completely free, unlimited, no account, no watermark. Runs entirely in your browser — your PNG is never uploaded.
Does compressing a PNG twice make it smaller?
Usually not. If PNG re-encoding does not reduce the file enough, try resizing its dimensions or choose WebP after checking that it works for your destination.