Question 1

How much can images be compressed?

Accepted Answer

Using MozJPEG compression, most JPEG images can be reduced by 40-80% with minimal visible quality loss. PNG files with many colors can typically be reduced by 20-50%. Results vary depending on the image content and original compression level.

Question 2

Does compression reduce image quality?

Accepted Answer

Lossy compression (JPEG) does reduce quality slightly, but MozJPEG is optimized to minimize visible differences. At quality level 80, most images look identical to the original but are significantly smaller. Lossless PNG compression preserves quality completely.

Question 3

What image formats are supported?

Accepted Answer

ImgTools supports JPEG, PNG, WebP, AVIF, GIF, and TIFF formats. You can compress any of these formats while maintaining the original format, or convert between formats using our Convert tool.

Question 4

Is there a file size limit?

Accepted Answer

Free users can compress images up to 5 MB each, with 5 operations per day. Pro users ($3/month) can process images up to 25 MB with unlimited daily operations and batch processing.

Question 5

Are my images stored on the server?

Accepted Answer

Images are processed on the server using Sharp (libvips) for high-quality results, but they are immediately deleted after processing. We do not store, analyze, or share your images.

Question 6

Why should I compress images?

Accepted Answer

Compressed images load faster on websites, reduce bandwidth costs, improve SEO rankings (Google considers page speed), and take less storage space. For web use, compressed images are essential for good user experience.

Compress Image