Quick answer
To compress an image, add it to the KitFuse image compressor. It's compressed instantly at 72 percent quality and resized to a maximum of 1920 pixels, which typically cuts file size by 60 to 90 percent for phone photos. Adjust the quality or size, then download. PNGs are shrunk by reducing colors, like TinyPNG.
How to compress an image
- Add images.
Drag JPG, PNG, WebP or HEIC files onto the page. Up to 100 at a time.
- Adjust if needed.
Lower the quality or maximum size for smaller files. Results update live, with the saving shown for each image.
- Download.
Save each image or all of them as a ZIP.
How image compression works
Two things make photos big: pixels and how they're stored. A modern phone photo can be 4000 pixels wide, far more than any screen or email needs, so resizing it to 1920 pixels removes most of the weight on its own. Then the quality setting decides how much detail the JPG or WebP encoder keeps. Around 70 to 80 percent is the sweet spot: files shrink dramatically while the difference is very hard to see.
PNG works differently because it's lossless. KitFuse shrinks PNGs by reducing them to a palette of up to 256 carefully chosen colors, the same technique TinyPNG uses. For screenshots, logos and graphics, this often cuts the size by 60 to 80 percent.
Tips for the smallest files
- For websites, convert to WebP or AVIF under Output format: they're much smaller than JPG at the same quality.
- Photos of documents compress well at lower quality settings, around 60 percent.
- If an image gets bigger, it was already well optimized. Try a lower quality or another format.
- Compressed images are saved without metadata, which also saves a few kilobytes.
Need exact dimensions instead? Use the image resizer.
Frequently asked questions
How much can I reduce image size?
For photos straight from a phone, 70 to 90 percent is common with the default settings. Screenshots and graphics saved as PNG usually shrink by 50 to 80 percent.
Does compression reduce quality?
JPG, WebP and AVIF compression removes detail the eye rarely notices. At the default settings the difference is very hard to see. Raise the quality slider if you need more detail.
Can I compress images on my phone?
Yes. The compressor works in mobile browsers and you can save results straight to your gallery where your phone supports it.
Are my images uploaded?
No. Everything happens on your device. Your images never leave it.