Keep original dimensions
Compression changes encoding, not width and height.
Private · Browser-based · No upload
Compress JPG Images Online
Compress JPG images directly in your browser while keeping the original pixel dimensions.
JPG · PNG · WebP
Choose imagesDrag or click to choose
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 JPG Images Online
- 1
Add images to compress
Choose, drag or paste one or more JPG, PNG or WebP images.
- 2
Choose the compression method
Set JPG/WebP quality or choose the PNG OxiPNG optimization level. Pixel dimensions stay unchanged by default.
- 3
Compress and download
Compare original and output sizes, then download one result or a ZIP for multiple images.
About Compress JPG Images Online
Compression keeps the original pixel dimensions by default. JPG and WebP use adjustable lossy quality; PNG uses lossless OxiPNG optimization.
About JPG
JPG is a widely supported lossy photo format. It is convenient for sharing and compatibility, but it does not support transparency.
Frequently asked questions
Does compressing a JPG change its dimensions?
No. Compression keeps the original pixel width and height. Use Resize as a separate step when you also need fewer pixels.
Will JPG compression make the image blurry?
JPG compression is lossy. Lower quality usually makes a smaller file but can affect fine detail, text edges, and smooth gradients. Start with Balanced and compare the result.
Why did my JPG not become smaller?
Some JPG files are already efficiently encoded. If recompression would make a larger file, ViewerPix keeps the original rather than replacing it with a bigger result.
Are my JPG files uploaded or changed?
No. Compression runs locally in your browser and creates a separate result. ViewerPix does not upload, overwrite, or alter the source JPG.
Private browser processing
ViewerPix processes supported images on your device. Your image files are not uploaded to a ViewerPix application server for this task.
Compression changes encoding, not pixel dimensions
ViewerPix keeps width and height unchanged by default. JPG and WebP use adjustable lossy quality; PNG uses lossless OxiPNG optimization instead of a fake quality slider.
JPG
JPG compression is lossy. Lower quality usually produces a smaller file but can introduce visible artifacts; higher quality preserves more detail.
Why can the output stay the same size?
Some images are already efficiently encoded. If recompressing would make a file larger, ViewerPix keeps the original file instead of replacing it with a worse result.