Jeff Starr

This plugin completely disables WP responsive-image feature that was introduced in version 4.4. It is meant for people who know what they are doing and want to use their own responsive-image techniques.
Features
<ul>
<li>Disables responsive images on the front-end</li>
<li>Disables generation of <code>medium_large</code> 768px image size</li>
<li>Completely plug-and-play, no configuration required</li>
<li>Works perfectly with or without Gutenberg block editor</li>
<li>Uses the WP API to disable responsive images</li>
<li>Clean, lightweight code, a real pleasure</li>
</ul>
Why would anyone want to do this? Check out the FAQs below for all sorts of good reasons.
Check out <a href="https://perishablepress.com/disable-wordpress-responsive-images/" rel="nofollow ugc">Disable WordPress Responsive Images</a> at Perishable Press for more information about how this plugin works, etc.
<blockquote>
Related: Free plugin to control which image sizes are generated by WordPress, check out <a href="https://wordpress.org/plugins/disable-media-sizes/" rel="ugc">Disable Media Sizes</a>.
</blockquote>
Privacy
This plugin does not collect or store any user data. It does not set any cookies, and it does not connect to any third-party locations. Thus, this plugin does not affect user privacy in any way.
Disable Responsive Images Complete is developed and maintained by <a href="https://x.com/perishable" rel="nofollow ugc">Jeff Starr</a>, 15-year <a href="https://plugin-planet.com/" rel="nofollow ugc">WordPress developer</a> and <a href="https://books.perishablepress.com/" rel="nofollow ugc">book author</a>.
Support development
I develop and maintain this free plugin with love for the WordPress community. To show support, you can <a href="https://monzillamedia.com/donate.html" rel="nofollow ugc">make a donation</a> or purchase one of my books:
<ul>
<li><a href="https://wp-tao.com/" rel="nofollow ugc">The Tao of WordPress</a></li>
<li><a href="https://digwp.com/" rel="nofollow ugc">Digging into WordPress</a></li>
<li><a href="https://htaccessbook.com/" rel="nofollow ugc">.htaccess made easy</a></li>
<li><a href="https://wp-tao.com/wordpress-themes-book/" rel="nofollow ugc">WordPress Themes In Depth</a></li>
<li><a href="https://books.perishablepress.com/downloads/wizards-collection-sql-recipes-wordpress/" rel="nofollow ugc">Wizard’s SQL Recipes for WordPress</a></li>
</ul>
And/or purchase one of my premium WordPress plugins:
<ul>
<li><a href="https://plugin-planet.com/bbq-pro/" rel="nofollow ugc">BBQ Pro</a> – Blazing fast WordPress firewall</li>
<li><a href="https://plugin-planet.com/blackhole-pro/" rel="nofollow ugc">Blackhole Pro</a> – Automatically block bad bots</li>
<li><a href="https://plugin-planet.com/banhammer-pro/" rel="nofollow ugc">Banhammer Pro</a> – Monitor traffic and ban the bad guys</li>
<li><a href="https://plugin-planet.com/ga-google-analytics-pro/" rel="nofollow ugc">GA Google Analytics Pro</a> – Connect WordPress to Google Analytics</li>
<li><a href="https://plugin-planet.com/head-meta-pro/" rel="nofollow ugc">Head Meta Pro</a> – Ultimate Meta Tags for WordPress</li>
<li><a href="https://plugin-planet.com/simple-ajax-chat-pro/" rel="nofollow ugc">Simple Ajax Chat Pro</a> – Unlimited chat rooms</li>
<li><a href="https://plugin-planet.com/usp-pro/" rel="nofollow ugc">USP Pro</a> – Unlimited front-end forms</li>
</ul>
Links, tweets and likes also appreciated. Thank you! 🙂

Disable Responsive Images Complete

Light as feather and fixed our problem of WordPress "helping" us by serving an unoptimised, resized version of a PNG image that was 4x the size of the original. You'd think they'd just not add it if was larger.

Ace.

We had a client site that kept claiming their images were blurry. I was unable to duplicate it, but I figured it was due to the responsive images being output. I activated the plugin and could immediately spot the culprit. I figured there was a plugin with a reputable author that had a solution for this, so thank you so much for developing it.

Works Perfect

Completely disables WP responsive images.

Joseph Fusco

Disables responsive images introduced in 4.4. This plugin is only meant to be a temporary solution to fixing conflicts with certain plugins and themes. Responsive images drive the web forward. 
Credit for solution goes to Birgir Erlendsson.

Disable Responsive Images

Disables responsive images introduced in 4.4.

Disable Responsive Images Complete vs Disable Responsive Images