PNG Image Compressor
Reduce the size of your PNG images by adjusting the compression level. Useful for optimising assets before integrating them into your projects.
Lossless compression
PNG compression is lossless. Reducing the file size does not alter the visual content of the image.
Transparency preserved
Alpha channel transparency is fully preserved during compression. Your transparent PNGs remain transparent.
Consider switching to WebP
For web use, converting PNG to WebP typically reduces file size by 26% more. Try our PNG to WebP converter.
How it works in 3 steps
- Add your images Drag and drop your files or click to browse. Convert one image or a whole batch at once.
- Choose your settings Pick the output format and adjust the quality slider if you want a smaller file.
- Download Run the conversion and download your images. Every file is deleted from our servers after one hour.
Real-world size comparison
Average sizes measured on typical PNG assets after palette quantization. Screenshots, logos and flat-color illustrations compress best, and transparency is preserved throughout. Photographic PNGs gain less and are better served as WebP.
| Image type | Source | Output | Saved |
|---|---|---|---|
| PNG screenshot 1440×900 | 480 KB | 150 KB | -69% |
| Transparent brand logo 512×512 | 64 KB | 22 KB | -66% |
| Flat-color illustration 1200×800 | 240 KB | 88 KB | -63% |
| App UI mockup 1920×1080 | 720 KB | 240 KB | -67% |
When to convert, when to keep the original
Convert when
- Screenshots and UI mockups shared on a blog or in documentation
- Logos, icons and flat-color illustrations that must keep transparency
- PNG assets bundled in an app, email signature or slide deck
- Any PNG over 200 KB on a web page where LCP and load time matter
Keep the original when
- The PNG is the master file for a Photoshop or Figma edit
- The image is a photograph (convert to WebP or JPG for a bigger gain)
- The PNG is already only a few KB (the gain is marginal)
- You need a byte-for-byte lossless archive copy
Frequently Asked Questions
Does compressing PNG reduce quality?
No. PNG uses lossless compression, so the compression level only affects encoding efficiency, not the visual content.
What is the difference between PNG compression level and quality?
For PNG, the quality slider controls compression effort (higher = smaller file, slower). The visual output is identical at any compression level.
When should I use PNG vs WebP for the web?
Use WebP for serving images on the web (better compression). Keep PNG for source files or when software compatibility requires it.
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