Auto Image Resizer Pro

The "Auto Image Resizer" is a state of the art WordPress Plugin which reduces your uploaded images to the maximal used image dimensions of your WordPress website.

If the uploaders (author, member, whoever) browsers supports html5, gears, flash or silverlight the images will be resized directly on the client otherwise the server will do that. So the plugin works in every case regardless of the clients browser or OS.


  1. The free Lite Version
  2. How it works
  3. Installation
  4. Configuration
    1. Maximal image size
    2. Image quality
    3. Automatic Update

The free Lite Version

In the free version of the plugin you can test the plugin as long as you want but with a small limitation: The free version can handle sepia images only. Of course in the pro version you can upload true color images, too! You can find the free version of the plugin here.

How it works

  1. Download the plugin and install it on your WordPress website or blog
  2. Configure the plugin in the WordPress backend (or use the default options)
  3. If a user uploads a new image to the media library, to a post or a page (or a custom post type) the plugin analyses the image dimensions automatically and unnoticeable.
  4. If the uploaded image is bigger than the defined maximal image dimensions it will be reduced to the maximal height and width without cropping or deforming it.
  5. If the uploaders browsers supports html5, gears, flash or silverlight the images will be resized directly on the client before uploading them.
  6. Then the reduced version of the uploaded image will replace the "large size" version of the image.

This saves your web space the traffic of the website visitors.


After you have purchased the Auto Image Resizer Plugin you get it as .zip archive. You can upload this .zip archive in your WordPress Backend in Plugins -> Add New -> Upload to your website or blog.

(Seasoned WordPress users can also upload the extracted archive to wp-content/plugins/.)

After installing the plugin you need to activate it in Plugins -> Installed Plugins -> Auto Image Resizer -> Activate.


As soon as the plugin is activated it is operable. By default the maximal image dimensions from your current media settings will be used and there is a small set of default options.

Maximal image size

You can change the maximal image dimension in Settings -> Media -> Image sizes -> Large Size.

Auto Image Resizer Media Settings

Image quality

You can change the image quality in Settings -> Auto Image Resizer -> Image quality.

Auto Image Resizer Settings

Custom Image Sizes

Some Plugins and Themes use custom image sizes for post thumbnail images or header banners. The Auto Image Resizer take care of the image dimensions of other components so your images could be some pixel bigger than your "large size" option.

Automatic Updates

On the Settings page you can enable or disable the automatic updates. To make use of the automatic updates please enter your account details in the corresponding option box.

Download Auto Image Resizer Pro

The current release version of Auto Image Resizer Pro is 1.2.9.

Plan / Includes Only the plain Plugin Plugin and Updates Updates and Support
Plan / Includes Only the plain Plugin Plugin and Updates Updates and Support
WordPress Plugin
Updates for 5 days.
Updates for 360 days.
No Support.
Support for 360 days.
Possibly you need to pay value added taxes in your region:
United States Dollar 11.95 US$ Euro 8.95 € Pound Sterling 7.95 £ Dollar Canadien 11.95 C$ Yen 1092 ¥ Australian Dollar 12.95 A$ Schweizer Franken 10.95 SFr Dansk krone 63.95 kr Norsk krone 68.95 kr Svensk krona 75.95 kr New Zealand Dollar 14.95 NZ$ Polski złoty 37.95 zł Hong Kong Dollar 86.95 HK$ Singapore Dollar 14.95 SG$ Magyar forint 2548 Ft Koruna česká 221.95 korun שקל חדש 40.95 ₪ peso mexicano 147.95 MX$ piso 485.95 P บาท 347.95 ฿
All prices are net prices.
United States Dollar 34.95 US$ Euro 26.95 € Pound Sterling 22.95 £ Dollar Canadien 36.95 C$ Yen 3410 ¥ Australian Dollar 37.95 A$ Schweizer Franken 32.95 SFr Dansk krone 199.95 kr Norsk krone 212.95 kr Svensk krona 234.95 kr New Zealand Dollar 44.95 NZ$ Polski złoty 116.95 zł Hong Kong Dollar 270.95 HK$ Singapore Dollar 44.95 SG$ Magyar forint 7961 Ft Koruna česká 692.95 korun שקל חדש 126.95 ₪ peso mexicano 460.95 MX$ piso 1,516.95 P บาท 1,087.95 ฿
All prices are net prices.
  1. Download the Lite or Pro Version of the plugin (it should be a .zip file).
  2. Go to your WordPress Dashboard and login.
  3. Deactivate all other versions of the plugin. (Especially deactivate the Lite version if you want to install the Pro version.)
  4. Go to Plugins ->Add New -> Upload.
  5. Upload the downloaded .zip file of the plugin.
  6. After the upload was successful activate the plugin.
Posted by Frank Demming on 15. October 2012

I have a photography site and I get a lot of I/O errors if I upload the full picture size. It keeps timing out. I suspect that it is the size of the file. Will this plug-in reduce the size of the files prior to uploading, or does it do it while uploading? Please advise.

Posted by Dennis Hoppe on 15. October 2012

Hi Frank, I would recommend you try it with the free lite version. ;)

Posted by Graham Budd on 28. September 2012

Our members add thumbnails within their comments via a plugin with a maximum size of 250 pixels but I also want to allow them to upload images to the library with a maximum size of 770. Will the pro version of the plugin allow us to set different upload settings for thumbnails and full size images?

Posted by Dennis Hoppe on 28. September 2012

Hi Graham, the Auto Image Resizer does only resample the biggest image.

Posted by Ranger on 30. August 2012

Will this plugin autosize Featured Images such that they won't crop at, say, 50x50? Rather, an original 200x100 image would end up at 100x50 in the Featured area rather than being just a crop of the middle of the original 200x100? That's what I need. Thanks!

Posted by Dennis Hoppe on 31. August 2012

The Auto Image Resizer does not crop images at all. ;)

Posted by m on 3. August 2012


Is it possible to set minimum size of pictures? so no more small pictures,always have same size pictures on my website
It means no small pictures or no big pictures

Posted by Dennis Hoppe on 5. August 2012

I do not think that this would be a useful feature. The idea is to save space and traffic and not to blow up images sizes. ;)

Posted by Rune on 17. July 2012


Testing the free version and it makes all images black and white, removes all colors.


Posted by Dennis Hoppe on 17. July 2012

Hi Rune, the lite version can only handle gray-scaled images. The Pro Version of the plugin can handle true color images, too. :)

About Dennis Hoppe

Dennis Hoppe is freelance web developer from Berlin, Germany. He provides premium WordPress development and consulting services at reasonable prices. Get in touch »