How much can image compression reduce file size?+
JPEG images can often be compressed to 30–60% of their original size with minimal visible quality loss at 75–85% quality. PNG compression depends heavily on the image content - photos compress less than flat graphics.
Should I use JPEG or WebP?+
WebP produces files 25–35% smaller than JPEG at equivalent quality and also supports transparency like PNG. Use WebP when you can, with JPEG as a fallback for older browsers.
Will compression affect my image dimensions?+
No. This tool only reduces file size - the pixel dimensions (width × height) remain unchanged.
What quality setting should I use?+
Start at 80% quality - most people cannot see the difference between 80% and 100% on screen. For images with large flat colour areas, you can often go lower. For photos with fine detail, stay at 75–85%.