Automatically optimise uploaded images using the PHP GD library — no external APIs, no account required.

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<p><strong>Effortless Simple Image Optimiser</strong> hooks directly into the WordPress Media Library upload pipeline and compresses, resizes and (optionally) converts images the moment they are uploaded — all using the built-in PHP GD extension.</p>
<h4>Features</h4>
<ul>
<li><strong>JPEG compression</strong> — re-encodes JPEGs at a configurable quality level (default: 82). GD strips EXIF metadata automatically, further reducing file size.</li>
<li><strong>PNG compression</strong> — applies lossless GD compression to PNG files.</li>
<li><strong>PNG <span aria-hidden="true" class="wp-exclude-emoji">→</span> JPEG conversion</strong> — converts opaque (non-transparent) PNGs to JPEG for significant space savings. Transparent PNGs are always kept as PNG.</li>
<li><strong>Image resizing</strong> — scales down images that exceed a configurable maximum width or height while maintaining the original aspect ratio.</li>
<li><strong>WebP generation</strong> — optionally saves a <code>.webp</code> sidecar file alongside every optimised image (requires GD compiled with WebP support).</li>
<li><strong>Zero external dependencies</strong> — no API keys, no third-party services, no composer packages.</li>
<li><strong>Graceful degradation</strong> — if GD is not available the plugin skips processing and logs a notice; uploads are never blocked.</li>
</ul>
<h4>Settings</h4>
<p>Navigate to <strong>Settings <span aria-hidden="true" class="wp-exclude-emoji">→</span> Image Optimiser</strong> to configure:</p>
<ul>
<li>Enable / disable automatic optimisation on upload</li>
<li>JPEG quality (1–100, default 82)</li>
<li>Enable PNG <span aria-hidden="true" class="wp-exclude-emoji">→</span> JPEG conversion</li>
<li>Enable WebP sidecar generation + WebP quality</li>
<li>Enable / disable resizing</li>
<li>Maximum width in pixels (default 1920)</li>
<li>Maximum height in pixels (default 1920)</li>
</ul>
<h4>Requirements</h4>
<ul>
<li>PHP 7.4 or higher</li>
<li>PHP GD extension (enabled on virtually all shared hosting)</li>
<li>WordPress 5.9 or higher</li>
</ul>


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