Compress PNG Images Online
Compress PNG files privately in your browser, preserve transparency, resize large graphics, or convert PNG to WebP and AVIF.
Free Batch processing No upload
Drop images hereor paste from your clipboard
JPG, PNG, WebP, AVIF, HEIC & GIF · up to 60 MB eachThree simple steps
From heavy to ready in seconds
Keep PNG or select WebP/AVIF for smaller files
Preview transparency and download
Designed for this job
Why this preset works
PNG is ideal for transparency, UI assets, screenshots, and flat graphics. For the largest savings, resize oversized images or export a modern WebP or AVIF copy.
Best for Logos and transparent graphics Screenshots Product cut-outs
Built for private work
Your images never visit our server.
Compression happens in this browser tab. There is no upload queue, cloud copy, image history, or account required.
Useful answers
Questions about png compressor
Will PNG transparency be preserved?+
Yes when exporting PNG, WebP, or AVIF. JPEG does not support transparency and uses a white background.
Why is my PNG still large?+
PNG is lossless. Large photographic PNGs often become much smaller as WebP or AVIF; oversized screenshots also benefit from resizing.
Are PNG files sent to a server?+
Yes. CompressMint processes images locally in your browser. Your photos are not uploaded to our servers, and refreshing the page clears the working session.