Compress PNG Images
Compress your PNG images by re-encoding with optimized compression. Reduce file sizes while maintaining lossless quality. Free, private, and browser-based.
Drag & drop your files here
or
You've reached the free daily limit of 5 conversions. Upgrade to Pro for unlimited conversions.
How to Compress PNG Images
Upload
Drag and drop your files or click Browse to select them.
Convert
Adjust the quality slider if needed, then click Convert All.
Download
Download your converted files individually or all at once.
Your files never leave your device. All conversion happens locally in your browser using the Canvas API and WebAssembly.
Frequently Asked Questions
Yes. PNG uses lossless compression, so re-encoding preserves perfect pixel quality. File size reduction comes from better compression algorithms, not quality loss.
Yes, completely free with no watermarks. Free users get 5 compressions per day. Pro users get unlimited compressions.
Results vary by image. PNGs exported from graphic editors are often not optimally compressed, so re-encoding can reduce sizes by 10-40% without any quality loss.
No. PNG compression preserves alpha transparency perfectly. Your transparent areas will remain exactly the same after compression.