Image Compressor
Shrink the file size of photos with adjustable quality, right in your browser.
How to use: Choose a photo and adjust the quality slider until the size looks right, then download it.
How to use the Image Compressor
Large images slow down websites, fill email limits and eat up storage. Compression reduces file size by storing the picture more efficiently, and with the right settings the difference to the eye is hard to notice.
Load an image, then lower the quality slider. For photographs, 60 to 80 percent usually gives a major saving with little visible change. The tool shows the new size and the percentage saved right below the preview, so you can find the best balance. PNG files are lossless and therefore do not shrink with a quality slider; for photos saved as PNG, switching the output to WebP or JPG normally cuts the size dramatically. For this reason, PNG photos are converted to WebP by default on this page.
You can also reduce the pixel dimensions, because fewer pixels mean fewer bytes. A photo displayed 800 pixels wide on a page does not need to be 4,000 pixels wide. Combining a resize with moderate compression gives the best results.
The tool works entirely in your browser using canvas, so nothing is uploaded and there are no file limits beyond your device’s memory. Compression of JPG and WebP is lossy: repeating it many times degrades quality, so always compress from the original file rather than from an already compressed copy.
Frequently asked questions
How much can I compress an image?
Photos often shrink by 50–80% with little visible change. The saving depends on the image content and quality setting.
Why doesn’t PNG get smaller with the slider?
PNG is a lossless format. To shrink it, resize it or switch to WebP or JPG, which use lossy compression.
Is the quality loss permanent?
Yes for the saved copy, so keep your original file.