How to use
- Click the upload area and select one or more images.
- On the Compress tab, choose JPEG or WebP and set the quality with the slider. Lower values give smaller files.
- Click Apply, compare the original and new sizes in the file list, and download the result.
The Compress tab re-encodes your image at the quality you choose, as JPEG or WebP. If you add a PNG or WebP file, WebP is selected for you, because JPEG cannot store transparency and would fill transparent areas. The slider runs from 10% to 100% in steps of 5%, and it starts at 80%. Lowering it reduces the file size, at the cost of more visible compression artifacts, so it helps to try a value and look at the result before downloading.
You can add several images to the list. For each file the tool shows the original size in kilobytes, the new size once processed, and the percentage saved. If you select more than one file, the Apply button processes the whole list, and each finished file has its own download button. You can remove files from the list or clear everything.
The same page has two more tabs that work on the same list: Resize (width and height with an optional aspect ratio lock, for many files at once) and Enlarge (scale by 2x or 4x). Switching tabs clears earlier results, so finish and download one operation before moving on. To crop or rotate, use the separate Image Cropper and Rotate & Flip tools.
Processing happens in your browser on a canvas element. The files you choose are not uploaded for compression.
FAQ
What format is the compressed file?
JPEG or WebP, whichever you choose. WebP is picked automatically for PNG and WebP files so transparent areas are kept; JPEG has no alpha channel.
How much smaller will my file get?
It depends on the image and the quality value. The tool shows the original size, the new size and the percentage saved for each file, so you can see the actual result.
Can I compress several images at once?
Yes. Add multiple files to the list and click Apply to process them together. Each result can be downloaded separately.
Is my photo uploaded anywhere?
No. The image is re-encoded in your browser and is not sent to a server.
Does it also resize images?
Yes. The Resize tab on the same page changes the pixel dimensions of every file in the list, while the Compress tab only changes the encoding.
What settings should I use to optimize images for the web?
For most photos, WebP at 75–80% quality gives a much smaller file with little visible change. If a photo is much larger than the size it will be shown at, shrink it first on the Resize tab, then compress it. Use WebP for images with transparency, because JPEG fills transparent areas.