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I want to use progressive jpg files and want to know if craft image transforms save jpg images as progressive, or can they be made to?

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You can achieve progressive JPGs if your server has Imagick installed, but it doesn't look like the image processing library that Craft is using has added support for it, yet.

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  • Does this mean that one day Craft will support transforming progressive JPGs? Provided Imagick is installed of course.
    – Josh Angell
    Nov 21, 2014 at 14:10
  • It'd be a lot more likely if Imagine adds support for it.
    – Brad Bell
    Nov 21, 2014 at 15:32
  • Right-o. Thanks for clarifying that.
    – Josh Angell
    Nov 21, 2014 at 15:33
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Yes. At least in the current version (3.2.6+)

On the image transformation page, you can select one of the interlacing methods under the "Interlacing" heading. I'm not exactly sure the differences or pros/cons of each but I've used "Partition" and it works well.

Screenshot showing "Partition" under Interlacing

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  • This doesn't seem to do anything. Images are still nog progressive.
    – Warre Buysse
    Jan 13, 2020 at 7:52

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