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.
Most PNG files on the web are bigger than they need to be because the compression level was never optimized. PixlFits applies optimal PNG settings (DEFLATE level 9, color palette quantization where safe) and lets you switch to lossless WebP for typically 25-50% smaller files at identical visual quality.
Three ways to compress a PNG
Lossless PNG re-encoding. Strips metadata, applies max-level DEFLATE, and uses a smarter palette where possible. Typical saving: 10-30%.
Convert to WebP (lossless). WebP's lossless mode is more efficient than PNG. Typical saving: 25-50% with zero quality loss.
Convert to WebP (lossy at 90%+). Visually identical to a PNG for almost all images. Typical saving: 60-85%.
PNG compression — common scenarios
Screenshots: Often compress 50-80% as lossy WebP without visible quality loss. PNG is overkill.
Logos and icons: Stay with PNG or use lossless WebP. Don't use lossy formats — sharp edges go fuzzy.
Illustrations with transparency: WebP (lossless or lossy) supports transparency and is far smaller than PNG.
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Open PNG Compressor →Frequently asked questions
How do I compress a PNG without losing quality?
Use lossless WebP — it's typically 25-50% smaller than PNG at zero quality loss. If you must keep PNG, re-encoding at DEFLATE level 9 with metadata stripped is the best you can do (10-30% savings).
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?
No. PNG compression is deterministic — running it twice doesn't help. To get smaller, switch to WebP or accept some lossy compression.