Compress Image

Quality 80–85 is the sweet spot for most uses — visually identical to the original on any normal screen, with file size 60–70% smaller. Use quality 90+ only if the image will be printed or viewed at very large sizes. Use quality 70 for background images or thumbnails.

For JPG and WebP (lossy formats), some data is always discarded — that is how lossy compression works. At quality 80–85, the discarded data is below the threshold of human perception under normal viewing conditions. For true lossless compression, convert to PNG before compressing.

For web publishing, 80% quality produces files 60–80% smaller than the original with no visible difference on photographs. For print materials, use 90–95%. For thumbnails and social previews, 70% is acceptable. Below 60%, JPEG artefacts (blocky edges, colour banding) become visible on most images.

Photographs tolerate aggressive compression well — 70–80% quality is usually indistinguishable from the original at normal viewing sizes. Graphics with flat colours, text, and sharp edges are more sensitive and require 85–90% to avoid visible artefacts. Compress, then zoom to 100% and check edges and text before finalising.