Installation
https://imagemagick.org/script/download.php#windows
1. Converting all files to jpg
In a folder, convert all png, webp, gif files to jpg.
magick mogrify -format jpg -background white -flatten *.png
magick mogrify -format jpg *.webp
magick mogrify -format jpg *.gif
2. File renaming
In Powershell, this will rename all jpeg to jpg.
dir *.jpeg | rename-item -newname { [io.path]::ChangeExtension($_.name, "jpg") }
3. Resizing all jpg files
This command "Shrinks an image with dimension(s) larger than the corresponding width and/or height argument(s)."
magick mogrify -resize '720x720>' *.jpg
4. Optimize image size
This command will optimize all jpg images to Google Pagespeed recommendations.
magick mogrify -sampling-factor 4:2:0 -strip -quality 85 -interlace JPEG -colorspace sRGB *.jpg
Others
These are other commands that may be useful.
magick mogrify -resize 960x528 *.jpg
This command resizes all of the .jpg files in your directory to a size of 960 pixels by 528 pixels. Perhaps the height isn’t as important as the width. You can simply enter:
magick mogrify -resize 960 *.jpg
This will scale all of your images to a width of 960 pixels, the height will be scaled accordingly, preserving the aspect ratio.
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