About This Tool
JPG Compressor helps reduce the file size of photos and other JPEG images. Adjust the quality, inspect details, and compare actual file sizes to find a result that works for email attachments, articles, or upload limits.
How to Use
- Choose or drop a JPG/JPEG image and check its original file size.
- Adjust the quality from 10% to 100%. The default is 80%.
- Click “Compress JPG” and compare the original, the result, and their file sizes. The result may be larger.
- Download the JPG once its quality and file size meet your needs.
Settings explained
- Quality ranges from 10% to 100%, with a default of 80%. Lower values usually produce smaller files but may reduce detail.
- The output is always JPG and keeps the original pixel width and height. Compression does not resize the image.
Supported Formats
- Input: JPG/JPEG.
- Output: JPG, with the original pixel dimensions preserved by default.
Image Processing Notes
Changes apply to the full original image and keep its loaded pixel width and height by default. The preview may appear smaller; the downloaded file contains the full processed image.
Each image can be up to 100 MiB. Files over 50 MiB trigger a high-memory-use notice. Original and output images are limited to 16 megapixels, with each dimension no greater than 16,384 pixels. Some operations have lower limits; resize the image first if prompted.
Compression and image quality
- The image is saved again as a JPG. The downloaded file contains the processed image, not just a renamed original.
- Results show the original size, output size, savings, and percentage change. If the file grows, the increase is clearly shown.
- Compression depends on the image’s texture, existing quality, and your browser. A heavily compressed JPG may not get much smaller.
- Repeated JPG saves can add compression loss. For each new result, start from a saved copy of the original.
- Downloads contain the full processed image. Saving again can change file size and compression details, and usually removes original EXIF, GPS, and similar information. Keep your original file.
Privacy
Images are processed entirely in your browser and are never uploaded to a server.
Files are not saved automatically. Download any results you want to keep before clearing or leaving the page, and keep your original file.
FAQ
Does a lower JPG quality always mean a smaller file?
The file usually gets smaller overall, but each quality step is not guaranteed to reduce it. Check the actual output size.
Does JPG compression reduce image quality?
It can. JPG is a lossy format. Lower quality may introduce blockiness, color artifacts around edges, or lost detail. Zoom in before downloading.
What happens if I compress a JPG repeatedly?
Each new save may add compression loss. Keep the original and use it to create the result you need in one pass.
Are my images uploaded to a server?
No. Image loading, adjustments, previews, and downloads all take place in your current browser. Images are not uploaded or sent to an online image processing service.