Drag & Drop Your PNG Image Here
image99.online
PNG Image Compressor
Reduce the file size of your PNG images with the best lossless compression, preserving full quality and transparency.
How to PNG a File
Upload Your PNG
Click "Browse File" or drag in your PNG.
Automatic Compression
Lossless re-encode removes metadata and optimizes data.
Download Your Image
Click "Download PNG" to save.
Key Features
Lossless Quality
No visual change — pixel-perfect results.
Preserves Transparency
Full alpha channel is kept intact.
Secure and Private
Works locally in your browser only.
Frequently Asked Questions
What is lossless compression?
Size goes down without changing any pixel data.
Does this tool preserve transparency?
Yes, alpha is preserved.
Why is there no quality slider?
PNG is lossless here, so a slider isn’t needed.