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.

Enfants Terribles digital GmbH

Enfants Img Performer converts your WordPress images to WebP automatically on upload – without sending a single byte to an external service. Everything runs on your own server, without limits.
The separately available Enfants Img Performer PRO plugin unlocks AVIF conversion, bulk optimization and AI-powered alt text generation.
<h4>Why Img Performer?</h4>
Most image optimization plugins send your images to a third-party cloud service for processing – often with monthly quotas and accounts required. Img Performer is different: it uses PHP’s built-in GD library (with Imagick as fallback) to convert images locally. Your images never leave your server. No account needed. No monthly limit.
<h4>What it does</h4>
<ul>
<li>Converts JPEG and PNG uploads to WebP automatically – unlimited, free</li>
<li>Converts all registered image sizes (thumbnail, medium, large, custom)</li>
<li>Rewrites <code>src</code>, <code>srcset</code>, <code>href</code> (lightbox) and lazy-load attributes in the frontend</li>
<li>Deletes WebP files when the original image is deleted</li>
<li>Logs all conversions for transparency</li>
<li>Configurable quality setting (1–100, default 85)</li>
<li>CO₂ savings tracker with optional anonymous global statistics</li>
</ul>
The separately available Enfants Img Performer PRO plugin (installed alongside this plugin) adds:
<ul>
<li>AVIF conversion – up to 50% smaller than WebP</li>
<li>Bulk Converter – convert your entire media library in one click</li>
<li>AI Alt Text Generator – WCAG-compliant alt texts via Mistral, Claude or OpenAI</li>
</ul>
<h4>GDPR / DSGVO</h4>
Enfants Img Performer processes all images exclusively on your own server. No image data, IP addresses or personal information is transferred to external services. No API keys required.
The only optional external connection is the anonymous CO₂ statistics feature (opt-in, disabled by default). When enabled, it sends only total bytes saved to our EU-based server – no IP address, no domain, no personal data.
<h4>Requirements</h4>
<ul>
<li>WordPress 6.0 or higher</li>
<li>PHP 7.4 or higher</li>
<li>GD extension with WebP support (<code>imagewebp</code>)</li>
</ul>
<h3>External Services</h3>
This plugin can optionally send anonymous usage data to an external service operated by Enfants Terribles digital GmbH.
CO₂ Statistics (opt-in, disabled by default)
When you enable “Global sustainability stats” in the plugin settings, the plugin sends the following data once per day to our EU-based server:
<ul>
<li>An anonymous random site ID (UUID v4, generated locally, no personal data)</li>
<li>Total bytes saved through WebP conversion</li>
</ul>
No images, no IP addresses, no domain names and no personal data are transmitted. The anonymous site ID cannot be traced back to you or your website.
This data is used solely to display a global CO₂ savings counter on the plugin website.
<ul>
<li>Service: Enfants Terribles digital GmbH (EU-based server, Netcup, Germany)</li>
<li>Endpoint: https://tools.enfants.de/imp-stats/</li>
<li>Privacy Policy: https://img-performer.enfants.de/datenschutz/</li>
<li>Terms of Use: https://img-performer.enfants.de/nutzungsbedingungen/</li>
</ul>

Enfants Img Performer

Automatically converts uploaded images to WebP on upload – on your server. No API, no cloud, no limit. 100% GDPR compliant.

Codcy Image Optimizer vs Enfants Img Performer