📦 PNG Compressor
Reduce the file size of a PNG image using zlib compression. Transparency is always preserved. Choose between three compression levels to balance size and speed.
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Drop a PNG image here
PNG only · max 25 MB
How it works
Upload your PNG, select a compression level, and click Compress PNG. The compressed PNG is ready instantly with transparency and all pixel data intact.
Frequently asked questions
Does compression affect image quality?
No. PNG compression is lossless — every pixel is recovered exactly when the image is decoded. Higher compression only means a smaller file, not lower quality.
Is transparency preserved?
Yes. The alpha channel is always preserved regardless of the compression level.
Is my file stored on the server?
No. Compression runs in memory and the result is sent directly to your browser.
Related tools: Image Compressor · PNG → JPG · Compress WebP