How to use it
- Click the box and choose one or more images, or drop them onto it.
- Pick the format, the quality and, if you like, a maximum size.
- Click Compress. Each result shows how much smaller it is. Download files one by one or as a ZIP.
What makes an image file smaller
Three things decide the size: the format, the quality and the pixel size. JPG and WebP at 60-80% quality are usually five to ten times smaller than the original with little visible loss. Reducing the longest side to 1920 px is often enough for screens, because most displays are no wider than that.
Good settings to start with
| Use | Format | Quality | Longest side |
|---|---|---|---|
| Email and chat | JPG | 70% | 1280 px |
| Website photos | WebP | 75% | 1920 px |
| Screenshots and logos | PNG | n/a | Original |
Frequently asked questions
Are my images uploaded?
No. Compression runs in your browser with the built-in canvas feature. Your images stay on your device.
Why did the file not get smaller?
If the original is already well compressed, or you chose PNG, the result can be the same size or larger. Try JPG or WebP with a lower quality, or reduce the longest side.
Does compression reduce quality?
JPG and WebP are lossy, so a lower quality setting removes some detail. At 70-85% the difference is hard to see for most photos.
Is the picture metadata kept?
No. Re-encoding removes EXIF data such as camera model and GPS location, which also makes files a little smaller.
Can I compress many images at once?
Yes. Add as many as your device can handle and download the results as one ZIP. Very large batches may be slow on phones.