Compress JPG Online
Compress JPG or JPEG photos in your browser with quality control, optional resizing and an actual before-and-after size comparison.
Image Compressor
Runs online, your files remain privateYour image is processed locally and never uploaded.
Your file stays on this device. Image data is processed in your browser and is not uploaded to GZ.
About this tool
JPEG compression trades some image detail for a smaller file. Lower quality can produce visible blockiness, ringing around edges or loss of fine texture. The best setting depends on image content and how large it will appear on screen.
PNG and WebP are also available as outputs. WebP may make a smaller file at comparable visual quality, while PNG avoids another lossy encoding but can be substantially larger.
How to use it
- Select a JPG or JPEG image.
- Adjust quality and optionally reduce the pixel dimensions.
- Compare the preview and file sizes, then download the compressed image.
Frequently asked questions
Are JPG and JPEG different?
No. They are two common extensions for the same JPEG format.
Can I compress without losing quality?
JPEG quality encoding is lossy. Reducing dimensions or removing metadata may lower file size without re-encoding JPEG pixels, but this browser tool re-encodes the image.