Reduce image file size while controlling quality
70% is a good default — noticeable compression with acceptable quality. For web images 60-75% is standard. Use 85-90% for print.
JPG, PNG, and WebP. Output format matches the input format.
Yes, images up to 20 MB are supported.
Yes. Files are sent over HTTPS and deleted within 1 hour.
Compressing an image means reducing its file size while keeping it looking as close to the original as possible. Photos from phones and cameras are often several megabytes each — far larger than needed for websites, email, or messaging. An image compressor removes redundant data and optimizes how the image is stored, producing a much smaller file that loads faster and uploads easily, with little or no visible difference in quality.
There are two kinds of compression: lossy, which removes some image data to achieve much smaller sizes (ideal for photos), and lossless, which shrinks the file without discarding any detail. ConvertDox balances size and quality so your images stay sharp while getting dramatically lighter. Files are processed securely and deleted within minutes, with no watermark. Smaller images don't just save space — they make websites faster, which improves user experience and search ranking.
Large images are the most common cause of slow-loading pages. Compress them to speed up your site and improve SEO.
Shrink photos so they fit under email size limits and send without bouncing.
Compress images for quicker uploads and to stay within platform size requirements.
Reduce the size of photo libraries to free up space on devices and cloud storage.
Many forms and portals cap image upload sizes. Compression brings photos within the allowed limit.
Smaller images send and download faster over messaging apps and slow connections.
Yes, completely free with no signup and no watermark added to your images.
The tool balances size and quality, so most images look virtually identical at a much smaller size. Very high compression can soften fine detail, so review the result if quality is critical.
It varies by image, but photos often shrink by 50–80% with little visible difference. Images that are already optimized compress less.
Common formats including JPG, PNG, and WebP are supported. For converting between formats, use our Image Converter tool.
Yes. Your image is uploaded securely, compressed, and automatically deleted from our servers within minutes. We never store or share your files.
For multiple images, use our Batch Image Compressor to compress them all in one go.