diegopetroncari

<p><strong>Petro SEO Images to WebP</strong> converts your existing JPEG and PNG attachments to WebP in bulk, then serves them on the front-end through the standard <code><picture></code> element with a full responsive <code>srcset</code>. The original files stay untouched on disk, so reverting is as simple as flipping a switch.</p>
<p>Designed to be small, dependency-free and predictable. No external services, no images uploaded anywhere, no opaque queue.</p>
<h4>What it does</h4>
<ul>
<li>Converts every registered image size (full + thumbnails) to <code>.webp</code> next to the original (e.g. <code>photo.jpg</code> <span aria-hidden="true" class="wp-exclude-emoji">→</span> <code>photo.jpg.webp</code>).</li>
<li>Wraps <code><img></code> tags from <code>wp_get_attachment_image()</code> and <code>the_content</code> in <code><picture><source type="image/webp">…</picture></code>, preserving full <code>srcset</code> and <code>sizes</code>.</li>
<li>Skips images automatically if a previous run failed because of filesystem permissions, so you can retry on demand without reprocessing the whole library.</li>
<li>Ramps the WebP quality down (75 <span aria-hidden="true" class="wp-exclude-emoji">→</span> 60 <span aria-hidden="true" class="wp-exclude-emoji">→</span> 45 <span aria-hidden="true" class="wp-exclude-emoji">→</span> 40) when the encoded file ends up larger than the original, so you never ship a “WebP” that is heavier than the JPEG.</li>
<li>Idempotent: re-running the bulk job only touches new or updated images.</li>
</ul>
<h4>What it does NOT do</h4>
<ul>
<li>It does not delete or modify your original JPG/PNG files.</li>
<li>It does not require Imagick or a specific image library beyond what WordPress already uses (<code>wp_get_image_editor()</code>).</li>
<li>It does not phone home, register endpoints, or load remote scripts.</li>
</ul>
<h4>Privacy</h4>
<p>The plugin processes images locally using WordPress’s built-in image editor. No data is sent to third-party services.</p>


Petro SEO Images to WebP

Bulk-convert media library images to WebP for better SEO and Core Web Vitals. Originals stay on disk; the front-end serves WebP via the  tag.

malcalevak

<p>A WordPress implementation of the stellar Slimbox2 script by Christophe Beyls (an enhanced clone of the Lightbox script) which utilizes the jQuery library to create an impressive image overlay with slide-out effects.</p>
<p>Almost, if not all, options are configurable from the administration panel. For more on the settings and what they do check out the <a href="http://www.digitalia.be/software/slimbox2/" title="Slimbox 2, the ultimate lightweight Lightbox clone for jQuery" rel="nofollow ugc">Slimbox2</a> page.</p>
<p>Support forums are generously hosted by Ryan Hellyer of PixoPoint, <a href="http://pixopoint.com/forum/index.php?board=6.0" rel="nofollow ugc">here</a>.</p>
<p>Recent Changes in v1.1.3.1:<br />
1.  Changed index.php to UTF-8 without BOM encoding to resolve issues for some users.<br />
Recent Changes in v1.1.3:<br />
1.  Updated to Slimbox 2.05 to support WordPress 3.6<br />
2.  Removed unnecessary xfarbtastic.css</p>
<h3>Credits</h3>
<p>Thanks to the following for help with the development of this plugin:</p>
<ul>
<li><a href="http://www.digitalia.be/software/slimbox2" rel="nofollow ugc">Christophe Beyls</a> – Creator of the Slimbox2 Javascript</li>
<li><a href="http://gsgd.co.uk/sandbox/jquery/easing/" rel="nofollow ugc">George McGinley Smith</a> – Creator of the jQuery Easing Plugin Javascript</li>
<li><a href="http://acko.net/dev/farbtastic/" rel="nofollow ugc">Steven Wittens</a> – Creator of the jQuery Farbtastic colorpicker Javascript</li>
<li><a href="http://pixopoint.com" rel="nofollow ugc">Ryan Hellyer</a> – For spurring my interest in WordPress plugins by welcoming my assistance on his <a href="http://pixopoint.com/multi-level-navigation/" rel="nofollow ugc">Multi-level Navigation plugin</a> and for hosting our <a href="http://pixopoint.com/forum/index.php?board=6.0" rel="nofollow ugc">support forums</a>.</li>
<li>Spi for code suggestion to autogroup items by post.</li>
<li><a href="http://nv1962.net/" rel="nofollow ugc">nv1962</a> – Suggestion to implement localization and Spanish/Español and Dutch/Nederlandse translations.</li>
<li>Laws for German/Deutsch localization.</li>
<li>monodistortion  for CSS tweaks to prevent tiling of images.</li>
<li>Jandry for the French/Français translation.</li>
<li><a href="http://www.serhatyolacan.com" rel="nofollow ugc">Serhat Yolaçan</a> for the Turkish/Türkçe translation.</li>
<li><a href="http://pc.de" rel="nofollow ugc">Marcis G.</a> for the Belarusian/Беларускі translation.</li>
<li><a href="http://www.easespot.com" rel="nofollow ugc">easespot</a> for the Chinese/中文 translation and FunDo for additional assistance.</li>
<li><a href="http://www.techload.com.br/" rel="nofollow ugc">Marcelo</a> for the Brazilian Portuguese/Português brasileiro translation.</li>
<li><a href="http://www.Behumandesign.com" rel="nofollow ugc">Giacomo</a> for the Italian/Italiano translation.</li>
<li>Nata Strazda of <a href="http://www.webhostinghub.com" rel="nofollow ugc">Web Hub</a> for the Lithuanian/Lietuviškai translation.</li>
<li>ackie00h for the Japanese/日本語 translation.</li>
<li>nafanyabr for the Russian/русский язык translation.</li>
<li><a href="http://shachi.tw" rel="nofollow ugc">shachi</a> for the Traditional Chinese/繁體中文 translation.</li>
<li>Zareiff, for various Next/Previous/Close translation images when not provided by translators.</li>
<li>Anyone else I forgot to mention who’s made a suggestion or provided me with ideas.</li>
</ul>


WP-Slimbox2 Plugin

A WordPress implementation of the Slimbox2 javascript.

Petro SEO Images to WebP vs WP-Slimbox2 Plugin