How to use Image Compressor
- Choose or drop one or more JPG, PNG, or WEBP images.
- Adjust quality and select an output format.
- Review the size savings, then download each result.
Why use this image compressor?
Compress JPG, PNG, and WEBP images online for free. Compare file sizes and download optimized images, with processing performed locally in your browser. Image Toolbox is designed for quick one-off edits as well as everyday image workflows. There is nothing to install, and the controls are made to work on both desktop and mobile screens.
- Private by design: images stay on your device.
- Batch process up to 20 images without installing software.
- Choose a practical balance between file size and visual quality.
Frequently asked questions
Are my images uploaded to a server?
No. Your images are decoded and compressed locally in your browser. This tool does not send image files to our server.
Can compression make an image larger?
Yes. Some images, especially already optimized or small images, may not get smaller. Compare the before and after sizes before downloading.
Does quality affect PNG files?
The quality slider applies to JPEG and WEBP encoding. PNG is lossless, so its output size may not change much.