jpegmini's grain seems more blurry, which makes the image looks a bit more close to the original at 100%, it makes the artifacts less apparent.I saved at 48% to achieve the same file size (1.5mb). I tried it with a large resolution image (3.3mb) with small details: JPEG Photo Resolution Typical JPEGmini file size reduction The table below summarizes the file size reduction ratios achieved by JPEGmini for various photo resolutions. This enables fully automatic, maximal compression of photos with no human intervention required.

The JPEGmini algorithm imitates the perceptual qualities of the human visual system, ensuring that each photo is compressed to the maximum extent possible by removing redundancies, without creating any visual artifacts in the process. JPEGmini is capable of reducing the file size of standard JPEG photos by up to 80% (5X), while the resulting photos are visually identical to the original photos. The technology works in the domain of baseline JPEG, resulting in files that are fully compatible with any browser, photo software or device that support the standard JPEG format. JPEGmini is a patent-pending photo recompression technology, which significantly reduces the size of photographs without affecting their perceptual quality. Just ran across this today, and it looks pretty cool.

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