Compress Image by Quality %

How does quality % affect your image?

When you compress an image, the quality percentage controls how much detail is preserved. At 100%, the image is re-encoded with virtually no loss — but the file may actually be larger than the original if it was already well-compressed. At lower values like 60–75%, you get dramatically smaller files with changes that are barely visible to the human eye.

The sweet spot depends on your use case. For web images and social media, 65–80% is usually ideal — small files that still look sharp on screen. For print or archival, stay above 90%. For thumbnails or previews where speed matters most, 40–60% keeps things fast without looking pixelated.

Use the Before / After compare tool to see exactly what changes at each quality level. Drop your image, move the slider, and find the lowest quality that still looks great to you. Everything runs in your browser — your images are never uploaded anywhere.