wp.org search vs our merit ranking: “convert image”
wp.org orders by popularity, so a plugin a host bundled onto millions of sites, or a big-brand one that's slow and mediocre, can sit at the top. Our ranking is built to answer a different question: which of these is actually worth installing. How this works →
For “convert image”, we agree with wp.org on the top plugin, and our order differs from theirs on 11 of the top 20. 2 plugins are pushed down for signals wp.org ignores: errors, a host-installed base, or removal risk.
wp.org search ranks on
Install count (uncapped), the raw star average, freshness, and support. Popularity dominates, so the biggest install base usually wins regardless of how it got there.
We add
A cap on the install boost, volume-weighted ratings, and signals wp.org can't see: whether it throws errors on current PHP, whether the install base is organic or host-pushed, and its risk of being pulled.
Ranked above its merit
Image Optimizer – Compress Images and Convert to WebP or AVIF shows at wp.org #5 but places #23 on merit, a gap of 18 places. Its 1M+ installs carry it up the search order; its 1.7★ average from 81 reviews, plus freshness and upkeep, place it lower on our volume-weighted scale.
Buried gem
WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance places #12 on merit, 4.8★ from 2617 reviews, but shows at wp.org #18. A smaller install base keeps it further down the default search order than its quality signals alone would.
Imagify Image Optimization: Optimize Images | Compress & Convert to WebP/AVIF 900K+ · 4.3★ (1656)
wp.org #1 2 
Smush – Image Optimization, Compression, Lazy Load, WebP & CDN 1M+ · 4.8★ (6053)
wp.org #2 3 
ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF 300K+ · 4.5★ (830)
wp.org #3 4 
EWWW Image Optimizer 1M+ · 4.8★ (1842)
wp.org #4 5 
Converter for Media – Optimize images | Convert WebP & AVIF 500K+ · 4.9★ (1106)
wp.org #6 1 too low 6 
Robin Image Optimizer – Unlimited Image Optimization, WebP & AVIF 100K+ · 4.4★ (131)
wp.org #7 1 too low 7 
Auto Image Attributes From Filename With Bulk Updater (Add Alt Text, Image Title For Image SEO) 100K+ · 4.8★ (93)
wp.org #8 1 too low 8 
Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization 200K+ · 4.7★ (640)
wp.org #13 ↓1 5 too low 9 
Featured Image from URL (FIFU) 60K+ · 4.6★ (264)
wp.org #12 3 too low 10 
Modula Image Gallery – Photo Grid & Video Gallery 100K+ · 4.7★ (616)
wp.org #15 ↑1 5 too low 11 
Perfect Images: Regenerate Thumbnails, Image Sizes, WebP & AVIF 60K+ · 4.8★ (279)
wp.org #14 ↓1 3 too low 12 WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance 1M+ · 4.8★ (2617)
wp.org #18 6 too low 13 
ThumbPress – Compress Images, Manage Thumbnails, Detect Image Issues, WebP/AVIF, Lazy Loading, Hotlinking & More 20K+ · 3.7★ (117)
wp.org #9 4 too high 14 
TinyPNG Image Optimization – Image Compression JPEG & PNG | Convert to WebP & AVIF 100K+ · 4.5★ (181) throws errorsnot PHP-current
wp.org #10 4 too high 15 
WP Fastest Cache – WordPress Cache Plugin 1M+ · 4.9★ (4228)
wp.org #23 ↓1 8 too low 16 
Kraken.io Image Optimizer – Compress, Convert to WebP & AVIF, Resize & Bulk Optimize 10K+ · 4.5★ (119)
wp.org #17 ↓2 1 too low 17 
W3 Total Cache 900K+ · 4.4★ (5420)
wp.org #24 7 too low 18 
Image Alt Text 10K+ · 5.0★ (56)
wp.org #21 ↓1 3 too low 19 
Resize Image After Upload 80K+ · 4.8★ (56)
wp.org #19 ↓2 20 
Cimo – Free Instant Image Optimizer & WebP Converter 10K+ · 4.9★ (20) thin reviews
wp.org #16 ↓2 4 too high 21 
Modern Image Formats 100K+ · 3.6★ (26)
wp.org #11 10 too high 22 
Variation Swatches for WooCommerce – Color, Image & Size Swatches 200K+ · 4.6★ (51)
wp.org #22 ↓1 23 Image Optimizer – Compress Images and Convert to WebP or AVIF 1M+ · 1.7★ (81) host-installed base low rating, top placement
wp.org #5 18 too high 24 
Image Converter for WebP 1K+ · 5.0★ (4) thin reviews
wp.org #20 ↓1 4 too high Merit ranking caps the install boost at 1M (wp.org leaves it uncapped), replaces the raw star average with a volume-weighted Bayesian score and a Wilson lower bound, and keeps wp.org's own freshness and compatibility decays. Method from the plugin-directory source; see Meta Trac #8298. Positions are tracked daily from the first visit to a keyword, so the small arrows show movement since tracking began.