How to optimize image progressive

I have website and have issue about “Use Progressive JPEGs”, result test:

I don’t really know how to “Use Progressive JPEGs” best practice, please help me.

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Try googling “progressive jpeg converter”.

There are lots of online tools, some paid, some free. And if you want to automate image conversion as part of a website build script there are tools like ImageMagick that can optimize directories of images. Here a StackOverflow Post about Jpeg Optimization.

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