sojournings

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NextGEN Resize is plugin that resizes the your pictures on the fly depending on the options set using the screen. This plugin requires <a href="http://alexrabe.de/" rel="nofollow ugc">Alex Rabe’s</a> – <a href="https://wordpress.org/extend/plugins/nextgen-gallery/" rel="ugc">NextGEN Gallery Plugin</a>, without which the NextGEN Resize plugin simply will not work.
NextGEN Resize, says it all 🙂 – Every time you upload any and all images, it would resize them on the fly based on the options set on the settings page.
To report bugs/give feedback, please visit and comment on the <a href="http://designerfoo.com/nextgen-resize-wordpress-plugin-to-resize-nextgen-gallery-images" rel="nofollow ugc">wordpress plugin support</a> page on the <a href="http://designerfoo.com/" rel="nofollow ugc">website</a>.
Tested with
NextGEN Gallery 1.4.x and WP 2.8.x / 2.9
Features
<ol>
<li>Easy/Simple to use.</li>
<li>Resize images, reduce their size and dimensions on the fly, while using NextGEN</li>
<li>Resize images in a gallery on a click of a button! </li>
<li>Flexible settings, set dimentions, etc.</li>
<li>Easy to switch on and off.</li>
</ol>
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Please note
You will require a working installation of <a href="http://alexrabe.de/" rel="nofollow ugc">Alex Rabe’s</a> – <a href="https://wordpress.org/extend/plugins/nextgen-gallery/" rel="ugc">NextGEN Gallery Plugin</a>, without which the NextGEN Resize plugin simply will not work.

NextGEN – Resize

NextGEN Resize is plugin that resizes your pictures, photos while they upload, on the fly depending on the options set using the NextGEN Resize contro …

vogelundstrauss

Definition: NextGEN ZCropper is a plugin that resizes and crops(!) your pictures while uploading. It will always match your selected width and height, trying to display as much as possible of the original image. 
Why: I found several people like me requesting an instant crop functionality for NextGEN Gallery Images (not only the thumbnails). Here it is 😉 Any feature requests: Go to http://vogelundstrauss.de/blog 
Required: This plugin requires <a href="http://alexrabe.de/" rel="nofollow ugc">Alex Rabe’s</a> – <a href="https://wordpress.org/extend/plugins/nextgen-gallery/" rel="ugc">NextGEN Gallery Plugin</a>
To report bugs/give feedback/request support, please visit the vogelundstrauss.de/blog <a href="http://vogelundstrauss.de/blog" rel="nofollow ugc">wordpress plugin support</a>.
Tested with
NextGEN Gallery 1.8.2 and WP 3.2.x
<h3>How To</h3>
<ol>
<li>Go to settings page of the plugin</li>
<li>Switch ON/OFF</li>
<li>Select target width and height inside image options tab of NextGEN Gallery Options (see second screenshot)</li>
<li>Important: Keep the resize on upload option DE-activated inside image options tab </li>
<li>Upload pictures to your galleries using NextGEN image upload menu</li>
<li>DONE</li>
</ol>
NOTE: You require NextGEN Gallery Plugin by http://AlexRabe.de!

NextGEN – Z Cropper

NextGEN Z Cropper is a plugin that resizes and crops(!) your pictures while uploading them (not only thumbnails!). If the picture does not match your  …

NextGEN – Resize vs NextGEN – Z Cropper