Codcy

Codcy Image Optimizer converts your existing JPEG and PNG images to WebP format in bulk — directly on your server, with no third-party API or paid subscription required.
WebP images are significantly smaller than JPEG and PNG files (typically 60–95% smaller), which leads to faster page loads, lower bandwidth usage, and better Core Web Vitals scores.
How it works:
<ol>
<li>Scan — Analyzes your entire Media Library. Shows total image count, file size, and format breakdown before any changes are made.</li>
<li>Review — You decide when to start. Nothing is changed until you click Start.</li>
<li>Optimize — Converts images in batches of 20. Originals are backed up automatically.</li>
<li>Report — A detailed summary shows converted count, space saved, average compression rate, and any errors.</li>
</ol>
Key features:
<ul>
<li>Converts JPEG and PNG to WebP</li>
<li>Automatic backup of original files to <code>uploads/codcy-image-optimizer/backup/</code></li>
<li>Skips images where WebP would be larger than the original</li>
<li>Fixes EXIF orientation automatically (Imagick)</li>
<li>Resumes from where it left off if interrupted</li>
<li>Does not alter image dimensions or crop ratio</li>
<li>No external API, no account required</li>
<li>Works with Imagick (preferred) or GD Library</li>
</ul>
What it does NOT do (intentionally):
<ul>
<li>Does not resize images</li>
<li>Does not process GIF files (may contain animation)</li>
<li>Does not delete backups automatically</li>
</ul>

Codcy Image Optimizer

Bulk convert JPEG and PNG images to WebP. No external service. Runs entirely on your server with automatic backup.

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.

Codcy Image Optimizer vs Kitgenix Image Optimizer