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Looks interesting, though on recent iOS devices, images will be in HEIF format, which is about 50% the size of JPEG at similar quality, and MozJPEG isn't compat
by MikeCapone 8y ago
Looks interesting, though on recent iOS devices, images will be in HEIF format, which is about 50% the size of JPEG at similar quality, and MozJPEG isn't compatible with it afaik.
If you're interested in compressing JPEGs without quality loss, there's a free Mac app called ImageOptim that can handle JPEG, GIF and PNG. It has Google's Guetlzi, so on some JPEG you can reach 20-40% compression without any loss of quality that I could detect (and sometimes lower levels around 10% on images that are already well compressed or smaller resolution).
https://imageoptim.com/mac https://imageoptim.com/mac
- opencl 8y ago50% is extremely optimistic between HEIF and a good JPEG encoder (mozjpeg/guetzli). Guetzli usually produces very slightly better results than mozjpeg but is several hundred times slower. The 20-40% comparision is vs libjpeg.
- MikeCapone 8y agoGuetlzi comparison is mostly against JPEGs you can find in the wild (ie. from a digital camera). In my experience, Guetzli is a lot slowly than mozjpeg, but tops up at much higher space savings when the conditions are right.