Compress PNG images
Shrink screenshots, logos and graphics. The tool redraws them with their best 256 colors. Or keep every pixel with lossless OxiPNG. Transparency stays.
- Free, no sign-up
- Runs in your browser. Your files never leave your device.
- Updated
or paste an image with Ctrl V
How do I make a PNG smaller?
Drop the PNGs on the box above. At the default setting, the tool redraws each one with a palette of its 256 most useful colors and then packs it with OxiPNG. TinyPNG and pngquant get their big savings the same way. Images that already use 256 colors or fewer are packed without changing a pixel.
Lossy or lossless?
| Image (measured 4 November 2026) | Original | 256 colors | Lossless |
|---|---|---|---|
| App screenshot, 2194 × 1634 | 647 KB | 202 KB (−69%) | 324 KB (−50%) |
| Logo with soft shadow, 1024 × 1024 | 1.63 MB | 233 KB (−86%) | 860 KB (−48%) |
Use 256 colors (the default) for anything going on a website, into a document or a chat. Tick Lossless when every pixel must stay exact. That means source files for more editing, pixel art, or images with many subtle gradients that you will inspect closely.
What does the quality slider do to a PNG?
It sets the palette size: 256 colors from 70 up, 128 from 50, 64 from 35, and fewer below that. Fewer colors mean a smaller file and, sooner or later, visible steps in gradients. Smallest (55) gives 128 colors, which suits flat UI screenshots and simple logos well.
Should I convert PNG to WebP instead?
For a website, often yes. WebP keeps transparency and is usually smaller again: 169 KB for the logo above. Pick WebP in Format, or use the PNG to WebP converter. Keep PNG where an app does not accept WebP, such as some document editors and older apps.
Questions
How does PNG compression work if PNG is lossless?
There are two ways. Lossless compression (OxiPNG here) finds a tighter way to store the same pixels, and typically saves 10–50%. Lossy compression first redraws the image with a palette of up to 256 well-chosen colors, then stores that. Screenshots and graphics often shrink by 60–80% this way, and the palette PNG still opens everywhere.
Will 256 colors make my image look worse?
For screenshots, logos, icons and illustrations, rarely. They seldom use more than a few hundred distinct colors. The tool dithers smooth gradients and photos (it adds tiny dots of neighboring colors) so they do not band. Check any image in Compare, or tick Lossless to keep every pixel.
Does it keep transparency?
Yes, including soft edges and shadows. Transparent and half-transparent pixels get their own palette colors. Fully opaque areas never become slightly see-through.
Why is my PNG photo still large?
PNG is made for sharp graphics, not photos. A photo saved as PNG can be ten times the size of the same photo as JPG or WebP. Pick WebP in Format to keep transparency, or JPG if the photo has none.
Can I compress PNG screenshots straight from the clipboard?
Yes. Take a screenshot, click anywhere on this page and press Ctrl+V (⌘V on a Mac). The tool compresses it at once and names it with the time you pasted it.
Are my PNGs uploaded?
No. The palette reduction and OxiPNG both run in your browser. The files never leave your device.
More free tools
- Image Compressor Shrink JPG, PNG, WebP and AVIF images, one or hundreds at a time.
- Compress JPG Make JPG photos smaller, or get them under a size like 200 KB.
- Image Resizer Resize a whole folder to a width, height or percentage.
- JPG to WebP Save photos as WebP, usually a quarter to a third smaller.
- PNG to WebP Turn PNGs into much smaller WebP files. Transparency stays.
Save what you find in one click.
Kortex is a Chrome extension for Gemini Notebook (formerly NotebookLM). It sends AI chats, web pages, posts and YouTube videos into the notebook you pick. It keeps your notebooks organized. It exports them back out.
No card needed.