Imager is a tool for automated image compression, and can competitively optimize very noisy, high resolution images into rather “tiny” files.
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kraken.io : ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 24M
jpegmini.com : ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 16M
compression.ai: ▇▇▇▇▇▇▇▇ 8.90M
imager : ▇▇▇▇ 4.20M