adamprohack

<h3>What does this plugin do?</h3>
This plugin generate image thumbnails only when site need it, when someone call function with needed size, 
and saves disk space when image is uploaded to media library. 
You don’t need to use <code>add_image_size()</code> function.
<h3>How it works?</h3>
<ol>
<li>Upload image to media library</li>
<li>Change function <code>wp_get_attachment_image_url()</code> to <code>get_otf_image_url()</code> in your wordpress template</li>
<li>When function is invoke the first time, the image is dynamically adjust, create and stored</li>
<li>Page serve image in need size</li>
</ol>
<h3>Documentation</h3>
<pre><code>`php
function get_otf_image_url(
 $image_id, $size_name, 
 $width = 0, $height = 0, 
 $crop_mode = ["center", "center"], 
 $mime_type = "image/jpeg", $quality = 70)
`
</code></pre>
Parameters
<ul>
<li>Required: 
*$image_id – attachment id 
***$size_name** – dynamic size name 
***$width** – image width 
***$height** – image height</li>
<li>Optional 
*$crop_mode – image crop mode 
***$mime_type** – result image mime type 
***$quality** – result image quality</li>
</ul>
Return Value
<ul>
<li>Returns an url string</li>
</ul>

WP Images OTF Plugin

ShortPixel

A free, fast, easy to use, stable and frequently updated plugin to resize your images after upload. Supported by the friendly team that created <a href="https://wordpress.org/plugins/shortpixel-image-optimiser/" rel="ugc">ShortPixel</a> 🙂
This plugin automatically resizes images (JPEG, GIF, and PNG) when they are uploaded to within a given maximum width and/or height to reduce server space usage, speed up your website, save you time and boost your site’s SEO. 
Imagine that nowadays images can be over 4-5MB and using this plugin you can reduce them to 100-200KB with no extra effort on your side!
In addition, the plugin can force the re-compression of uploaded JPEG images and convert PNGs to JPEG (if they don’t have a transparency layer), regardless of whether they are resized or not.
Is that simple, just give it a try, it is safe and free! 🙂
Other plugins by <a href="https://shortpixel.com" rel="nofollow ugc">ShortPixel</a>:
<ul>
<li><a href="https://wordpress.org/plugins/fastpixel-website-accelerator/" rel="ugc">FastPixel Caching</a> – WP Optimization made easy</li>
<li><a href="https://wordpress.org/plugins/shortpixel-image-optimiser/" rel="ugc">ShortPixel Image Optimizer</a> – Image optimization & compression for all the images on your website, including WebP & AVIF delivery</li>
<li><a href="https://wordpress.org/plugins/shortpixel-adaptive-images/" rel="ugc">ShortPixel Adaptive Images</a> – On-the-fly image optimization & CDN delivery</li>
<li><a href="https://wordpress.org/plugins/enable-media-replace/" rel="ugc">Enable Media Replace</a> – Easily replace images or files in Media Library</li>
<li><a href="https://wordpress.org/plugins/regenerate-thumbnails-advanced/" rel="ugc">reGenerate Thumbnails Advanced</a> – Easily regenerate thumbnails</li>
<li><a href="https://wordpress.org/plugins/wp-svg-images/" rel="ugc">WP SVG Images</a> – Secure upload of SVG files to Media Library </li>
</ul>
Get in touch!
<ul>
<li>Email <a href="https://shortpixel.com/contact" rel="nofollow ugc">https://shortpixel.com/contact</a></li>
<li>Twitter <a href="https://twitter.com/shortpixel" rel="nofollow ugc">https://twitter.com/shortpixel</a></li>
<li>Facebook <a href="https://www.facebook.com/ShortPixel" rel="nofollow ugc">https://www.facebook.com/ShortPixel</a></li>
<li>LinkedIn <a href="https://www.linkedin.com/company/shortpixel" rel="nofollow ugc">https://www.linkedin.com/company/shortpixel</a></li>
</ul>

Resize Image After Upload


Unfortunately, Wordpress administrators do not deal with this at all, and all it takes is one careless editor and the administrator has a lot to do for many hours. With this plugin, servers are no longer filled with unnecessary giant images that are ultimately useless and just lie dead on the server and take up space. Lots of space.


Thanks for fixing the big images issue

Automatically resize your images after uploading using this plugin. Specify height&width, the plugin will do the rest quickly and transparently.

WP Images OTF Plugin vs Resize Image After Upload