Why would you want to re-size images? Well, there are a number of reasons, but primarily it’s a good idea to re-size images that you have uploaded straight from your camera because newer cameras (even point-and-shoot) are, by default, set to be for printing, so the files are usually too large for the web.

For internet browsing, images should be
800px on the longest side and at 72ppi.

There are times you’ll want it larger, but use this as a rule of thumb. Computer monitors don’t need as many pixels as printers do, so it’s a really good idea to optimize your images for the web to ensure quick download speeds. Remember that your users have to download a copy of your image to their computer in order to see it, so if you have a 3mb image, that could mean anywhere between 30s to 5 minutes of download time, depending on the user’s connection. Even 30s is too long. So you want to get your images to be under 500kb (1/2 a MB) or less if possible.  I usually aim for images to be between 75kb > 150kb. Typically, that’s plenty of pixel information for the web.

This was made for Sustainable Building Specialists, but it applies to anyone using the NextGen Plugin for WordPress.

First upload images to a gallery. Now we’ll assume that at least one of your images is enormous.

resize images

  1. Go to the Gallery Icon and choose Manage Gallery
  2. Check the images you want to re-size. You can choose to re-size all of them with the one-click option at the top, or choose individual images to resize.
  3. Choose your action in the drop-down box and click OK.

Picture 12The only other important thing to note is what size your NextGen is set to use. I believe the default is 800×600, but you can change that number in the options under Gallery > Options.

That’s it! It’s really that simple. You’ll notice there are a number of things you can do in that dropdown box, so if you had some extra time and felt like it, you could easily make a test gallery and perform each of the options and see what happens. That’s the best way to learn what to (and not to) do.