Decreasing image size of already uploaded images in WP

I uploaded many images to the system but now I realize that most of them are heavy (>200KB) and I need to reduce size of them. Reuploading and placing all images may take 4-5 hours so I’m looking for an automation.

Here’s what I tried:

  • I uploaded EWWW, but I couldn’t find how I can decrease size of previously uploaded items
  • I uploaded Smush, I started “Bulk Smash 50 Attachments” but it was stuck on the 3rd image.

What’s your suggestion?

OK, I solved the problem, let me share for the ones who may need later:

You can directly Smush all images one by one from the Media Library. It reduces the file sizes by %20-25, and the quality is “not bad”.