Compress
Compress PNG images
Shrink PNG files in your browser. Convert to WebP for dramatic savings, or resize while keeping transparency.
Drop images here
or · drop a folder · paste from clipboard
PNG is lossless, which is exactly why PNG files get so large. Every pixel is stored precisely, so a photograph saved as a PNG can easily be ten times the size of the same image as a JPEG. That is a good trade for screenshots, logos and diagrams, and a poor one for photographs.
Because the format is lossless, a quality slider does nothing for it. There are two things that genuinely reduce a PNG: making it smaller in pixels, or changing the format. Converting to WebP is usually the dramatic win — it keeps full transparency and routinely cuts PNG photographs by 80% or more.
If you need the file to stay a PNG, resizing is your lever. Set a maximum for the longest side and most oversized PNGs drop sharply without any visible change at the size they are displayed.
How to compress png images
- Drop your PNG files onto the box above.
- Keep PNG and resize, or switch the format to WebP for a much smaller file.
- Download the results individually or as a ZIP.
Frequently asked questions
Are my images uploaded to a server?
No. The conversion runs inside your browser using WebAssembly, so the image data never leaves your device. That also means there is no queue, no account, and no file size cap imposed by a server.
Why does the quality slider not affect my PNG?
PNG is a lossless format — there is no quality setting to trade away. To make a PNG smaller you either reduce its dimensions or convert it to a lossy format such as WebP.
Will converting to WebP lose my transparency?
No. WebP supports a full alpha channel, so logos, icons and cut-out images keep their transparency exactly. JPEG is the format that cannot, and there transparency is filled with white.
Can I convert several images at once?
Yes. Drop in as many files as you like — or a whole folder — and they are processed in parallel across your CPU cores. When they finish you can download them individually or grab everything as a single ZIP.