How to reduce PNG file size?
Reduce PNG weight while preserving transparency. Optimization and compression techniques.
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PNG is ideal for images with transparency, but files can become very heavy. Learning to reduce their size is essential.
PNG uses lossless compression, which limits reduction possibilities. However, advanced techniques exist to significantly lighten your files.
Our tool allows you to optimize your PNG images while perfectly preserving transparency.
Table of contents
Why are PNGs heavy?
PNG uses lossless compression that preserves every pixel.
The alpha channel (transparency) adds weight to the file.
Complex images with many colors are particularly heavy.
PNG optimization techniques
Palette reduction (quantization) converts 24-bit PNGs to 8-bit with limited colors.
PNG filter optimization chooses the best algorithms for each line.
Removing unnecessary metadata can save several kilobytes.
PNG-8 vs PNG-24
PNG-8 uses a palette of 256 colors maximum, much lighter.
PNG-24 supports millions of colors, heavier.
For logos and icons, PNG-8 is often sufficient.
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How to do it in 3 steps
Upload your PNG image.
Our tool applies optimal optimization.
Download your lighter PNG while preserving transparency.
Common mistakes to avoid
- ✗Converting a transparent PNG to JPG (loses transparency).
- ✗Using PNG for photos (JPG or WebP is better).
- ✗Not considering WebP as an alternative.
Frequently asked questions
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