When You Need To Resize Your Thumbnails in WordPress

At some point, especially if you change a WordPress theme, your thumbnail sizes will change and they aren’t quite working with your new theme. Or you may choose to change them in your existing theme.

Now if you want to change the size or how a thumbnail is cropped, you can do that via your media settings. But remember, this only changes the size on future media that is uploaded.

The solution is a simple one. On your plugins page, search for the plugin “Regenerate Thumbnails”. It’s just another great plugin from Viper 007 BondOr you can upload it here at WordPress.org. What it basically does is regenerate all your previous media that you uploaded to your new thumbnail size. It’s that simple.

And you can either regenerate the thumbnails for all image uploads, individual image uploads, or specific multiple image uploads.

To regenerate all your thumbnails, you will find it under Tools > Regen. Thumbnails.

regenerate all thumbnails

And if you want to do it to a specific image, you will find the option in your media library.

regenerate thumbnails single

Or, if you want to choose several specific images in your library, you can use the bulk actions.

regenerate thumbnails bulk actions

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  1. Steve February 5, 2015 at 8:59 am #

    I recommend using the Force Regenerate Thumbnails plugin (https://wordpress.org/support/view/plugin-reviews/force-regenerate-thumbnails) over this one. This plugin doesn’t delete any existing thumbnails it only adds new ones resulting in large amounts of wasted space. Force Regen removes the existing generated images and writes new ones. I’ve no affiliation to the Force Regen author.


    • Bob Dunn February 6, 2015 at 11:54 am #

      Hey Steve, appreciate the recommendation. Have been using this other one for so long it just became habit. But thinking about it, I do believe I have used the one you suggested the last few times more recently since this post. Again, thanks for sharing and cheers!


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