When you need to compress images
- An application site asks for images “under ○KB”
- A photo was too large to attach to an email
- You want lighter images on a blog or website so pages load faster
- You want to save storage space on your phone
Two ways to compress
Choose quality
Choose “High quality (a little smaller)”, “Standard (recommended)” or “Smaller (size first)”. Reducing the image size (pixels on the longest side) at the same time cuts file size a lot.
Set a file size (KB)
Enter a target size, and quality is adjusted to get under it. If lowering quality isn’t enough, the image dimensions are reduced too. If it still can’t be reached, the tool shows “Couldn’t reach the target size” and gives you the smallest image it could make.
Output formats
Choose JPG, WebP or the same format as the original. Photos saved as JPG usually get smaller. JPG has no transparency, so a PNG with a transparent background becomes white where it was transparent.
What to expect from quality
Compression gradually lowers image quality. The smaller the target, the more fine detail blurs or the smaller the image becomes. Open the downloaded image and check it before submitting.
Related tools
To set exact pixel dimensions, use Resize Images. To make a PDF smaller, use Compress PDF.
Your images are never uploaded
Your images aren’t uploaded to a server; they’re compressed in your browser.