Kitgenix

Kitgenix Image Optimizer compresses and resizes images automatically on upload and provides bulk optimization tools for your existing media library — all powered by WordPress’s native WP_Image_Editor (GD or Imagick). No external API required.
Designed to be lightweight and modular: 
– Automatic optimization on upload 
– Configurable JPEG, WebP, and PNG quality settings 
– Max-dimension resizing (preserves aspect ratio) 
– Optional WebP conversion 
– Optional EXIF metadata stripping 
– Optional thumbnail sub-size optimization 
– Per-image status tracking with a dedicated Images tab 
– Activity log for all optimization events 
– Bulk optimization with start/stop controls
<h4>Features</h4>
<ul>
<li>Zero external dependencies — uses WordPress’s built-in WP_Image_Editor powered by GD or Imagick.</li>
<li>Auto-optimize on upload — every new image is compressed and resized the moment it enters the media library.</li>
<li>Configurable quality — set JPEG quality (1–100), WebP quality (1–100), and PNG compression level (0–9) independently.</li>
<li>Max dimension capping — set maximum width and height; images exceeding those dimensions are scaled down while preserving aspect ratio.</li>
<li>WebP conversion — optionally convert JPEG and PNG images to WebP on upload.</li>
<li>Metadata stripping — remove EXIF data to shave extra bytes off every image.</li>
<li>Thumbnail optimization — optionally optimize every registered sub-size alongside the full image.</li>
<li>Bulk optimization — the Images tab shows your 30 most recent uploads with per-image status and a bulk start/stop control that processes one image at a time without timeouts.</li>
<li>Activity log — the Log tab records every optimization and settings change with timestamps.</li>
</ul>
<h3>Quick Start</h3>
<ol>
<li>Install and activate the plugin.</li>
<li>Go to Kitgenix → Image Optimizer to configure settings.</li>
<li>Upload an image — it will be optimized automatically if “Optimize on Upload” is enabled.</li>
<li>Use the Images tab to bulk-optimize existing media.</li>
</ol>

Kitgenix Image Optimizer

Optimize, compress, and resize images in your WordPress media library with automatic on-upload processing and bulk optimization tools.

domclic

Effortless Simple Image Optimiser 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.
<h4>Features</h4>
<ul>
<li>JPEG compression — re-encodes JPEGs at a configurable quality level (default: 82). GD strips EXIF metadata automatically, further reducing file size.</li>
<li>PNG compression — applies lossless GD compression to PNG files.</li>
<li>PNG → JPEG conversion — converts opaque (non-transparent) PNGs to JPEG for significant space savings. Transparent PNGs are always kept as PNG.</li>
<li>Image resizing — scales down images that exceed a configurable maximum width or height while maintaining the original aspect ratio.</li>
<li>WebP generation — optionally saves a <code>.webp</code> sidecar file alongside every optimised image (requires GD compiled with WebP support).</li>
<li>Zero external dependencies — no API keys, no third-party services, no composer packages.</li>
<li>Graceful degradation — if GD is not available the plugin skips processing and logs a notice; uploads are never blocked.</li>
</ul>
<h4>Settings</h4>
Navigate to Settings → Image Optimiser to configure:
<ul>
<li>Enable / disable automatic optimisation on upload</li>
<li>JPEG quality (1–100, default 82)</li>
<li>Enable PNG → 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>

EffortLess Simple Image Optimiser

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

Kitgenix Image Optimizer vs EffortLess Simple Image Optimiser