| #1 | ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF | 22 | 1,044 | 799 | 300k+ | | Non-prefixed global variable |
| #2 | Imagify: Optimize Images for Top Speed (Compress & Convert to WebP/AVIF) | 21 | 420 | 861 | 1m+ | | Non-prefixed global variable |
| #3 | Robin Image Optimizer – Unlimited Image Optimization, WebP & AVIF | 20 | 557 | 541 | 100k+ | | Output is not escaped |
| #4 | Smush – Image Optimization, Compression, Lazy Load, WebP & CDN | 25 | 252 | 566 | 1m+ | | Non-prefixed hook name |
| #5 | ThumbPress – Compress Images, Manage Thumbnails, Detect Image Issues, WebP/AVIF, Lazy Loading, Hotlinking & More | 33 | 101 | 289 | 30k+ | | Non-prefixed global variable |
| #6 | Kraken.io Image Optimizer – Compress, Convert to WebP & AVIF, Resize & Bulk Optimize | 67 | 293 | 80 | 9k+ | | Text Domain Mismatch |
| #7 | TinyPNG – JPEG, PNG & WebP image compression | 38 | 196 | 141 | 100k+ | | Output is not escaped |
| #8 | QODE Optimizer | 74 | 1 | 249 | 20k+ | | Non-prefixed global variable |
| #9 | Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization | 29 | 80 | 162 | 200k+ | | Nonce verification recommended |
| #10 | Converter for Media – Optimize images | Convert WebP & AVIF | 35 | 133 | 53 | 500k+ | | curl curl setopt |
| #11 | Image Optimization For SEO | 56 | 116 | 69 | 3k+ | | Non Singular String Literal Domain |
| #12 | Compress, Resize & Lazy Load Images – WPvivid Image Optimization | 47 | 107 | 58 | 10k+ | | Missing direct file access protection |
| #13 | Flying Images: Optimize and Lazy Load Images for Faster Page Speed | 40 | 32 | 58 | 3k+ | | Missing direct file access protection |
| #14 | Squeeze – Image Optimization & Compression, WEBP Conversion | 41 | 18 | 71 | 2k+ | | Nonce verification recommended |
| #15 | Disable Bulk Smush Limit of Smush Image Optimization | 35 | 3 | 2 | 3k+ | | Hidden files included |
