Just in case some people are confused:
”JPEGs Lose Quality Every Time They're Opened and/or Saved: False
Simply opening or displaying a JPEG image doesn't harm it in any way. Saving an image repeatedly during the same editing session without ever closing the image will not accumulate a loss in quality. Copying and renaming a JPEG will not introduce any loss, but some image editors do
recompress JPEGs when the "Save as" command is used. Duplicate and rename JPEGs in a file manager rather than using "Save as JPEG" in an editing program to avoid more loss.
JPEGs Lose Quality Every Time They're Opened, Edited and Saved: True
When a JPEG image is opened, edited and saved again it results in additional image degradation. It's very important to minimize the number of editing sessions between the initial and final version of a JPEG image. If you must perform editing functions in several sessions or in several different programs, you should use an
image formatthat is not lossy, such as TIFF, BMP or PNG, for the intermediate editing sessions before saving the final version. Repeated saving within the same editing sessionwon't introduce additional damage. It only happens when the image is closed, re-opened, edited and saved again.”
https://www.lifewire.com/jpeg-myths-and-facts-1701548