Keep original dimensions
Compression changes encoding, not width and height.
Private · Browser-based · No upload
Compress Images Online
Reduce image file size while keeping the original pixel dimensions. Files stay on your device.
JPG · PNG · WebP
Drop JPG, PNG or WebP images hereor click to choose filesJPG · PNG · WebP · Multiple files supported
Images 0
Right method for each format
JPG and WebP use quality control; PNG uses lossless OxiPNG optimization.
Batch compression
Compress several images, compare before and after sizes, then download individually or all at once.
How to use Compress Images Online
- 1
Add your image
Choose a file from your device or drag it into the tool. Supported files are processed directly in your browser.
- 2
Choose the result you need
Use the controls shown on this page for this exact task. The page keeps the relevant format or operation preselected when possible.
- 3
Preview and download
Check the result, then download the finished image. No account is required.
About Compress Images Online
Compression keeps the original pixel dimensions by default. JPG and WebP use adjustable lossy quality; PNG uses lossless OxiPNG optimization.
Frequently asked questions
Are my images uploaded to a server?
No. Supported image processing runs locally in your browser. Third-party decoder code may be loaded only when a format needs it, but your image itself stays on your device.
Do I need an account?
No. The current ViewerPix tools work without registration.
Does this work on mobile?
Yes. The interface is responsive, although very large images can be limited by the memory available in the browser.
Private browser processing
ViewerPix processes supported images on your device. Your image files are not uploaded to a ViewerPix application server for this task.