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wp.org search vs our merit ranking: “serve images”

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 “serve images”, we agree with wp.org on the top plugin, and our order differs from theirs on 9 of the top 20.

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 the install base is organic or host-pushed, and its risk of being pulled.

Ranked above its merit

Enable SVG, WebP, and ICO Upload shows at wp.org #10 but places #20 on merit, a gap of 10 places. Its 10K+ installs carry it up the search order; its 4.6★ average from 11 reviews, plus freshness and upkeep, place it lower on our volume-weighted scale.

How this rank is calculated

Each plugin's merit score multiplies these inputs together: how recently it was updated, how current its "tested up to" WordPress version is, its install base (log scale, capped at 10 million), its support thread resolution rate, and a rating score. The rating score weights the star average by review volume against a sitewide prior, then scales it by the lower bound of the share of 4 and 5 star reviews. A plugin with 3.7 stars from tens of thousands of reviews can still outscore a 4.9 with a few dozen, because the small sample carries less certainty.

A health factor between 0.4 and 1.15 then adjusts that score for what wp.org's search can't see: PHP fatals or failed activations on a test install, PHP and WordPress compatibility, memory and page-speed footprint, suspicious review patterns, closure risk, and a large install base with very few reviews. Clean, adopted plugins earn a small lift.

A keyword ranking starts from wp.org's search order for the term, weighting each position by 1 divided by its place, then applies the merit correction and health factor above. Relevance to the keyword stays in the result, so the order can differ from the all-categories list on /best, which scores plugins with no search term.

Hover a row to see the main reason for its position.

merit plugin wp.org
1 Smush – Image Optimization, Compression, Lazy Load, WebP & CDN 1M+ · 4.8★ (6053) wp.org #1 2 Jetpack – AI Agents & MCP, Security, Backup & Analytics 3M+ · 3.7★ (2409) wp.org #2 ↑9 3 LiteSpeed Cache 7M+ · 4.8★ (2778) wp.org #3 ↑1 4 WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance 1M+ · 4.8★ (2617) wp.org #4 ↓1 5 Modula Image Gallery – Photo Grid & Video Gallery 100K+ · 4.7★ (617) wp.org #6 1 too low 6 Imagify Image Optimization: Optimize Images | Compress & Convert to WebP/AVIF 900K+ · 4.3★ (1657) wp.org #5 ↓3 1 too high 7 Converter for Media – Optimize images | Convert WebP & AVIF 500K+ · 4.9★ (1108) wp.org #7 ↓2 8 WP Fastest Cache – WordPress Cache Plugin 1M+ · 4.9★ (4230) wp.org #11 ↑6 3 too low 9 TinyPNG Image Optimization – Image Compression JPEG & PNG | Convert to WebP & AVIF 100K+ · 4.5★ (181) wp.org #8 ↓1 1 too high 10 ShortPixel Adaptive Images – WebP, AVIF, CDN, Image Optimization 10K+ · 4.8★ (145) wp.org #9 ↓1 1 too high 11 Perfect Images: Regenerate Thumbnails, Image Sizes, WebP & AVIF 60K+ · 4.8★ (279) wp.org #12 ↓2 1 too low 12 Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization 200K+ · 4.7★ (640) wp.org #15 ↓1 3 too low 13 Featured Image from URL (FIFU) 60K+ · 4.6★ (264) wp.org #18 5 too low 14 W3 Total Cache 900K+ · 4.4★ (5420) wp.org #23 9 too low 15 Super Page Cache – Cloudflare Cache, Page Speed & Core Web Vitals 70K+ · 4.8★ (518) wp.org #24 9 too low 16 WP Super Cache 1M+ · 4.3★ (1346) wp.org #20 ↑4 4 too low 17 Kraken.io Image Optimizer – Compress, Convert to WebP & AVIF, Resize & Bulk Optimize 10K+ · 4.5★ (119) wp.org #19 ↑2 2 too low 18 Offload, AI & Optimize with Cloudflare Images 1K+ · 4.9★ (33) wp.org #14 ↓1 4 too high 19 Images to WebP 9K+ · 4.4★ (32) wp.org #13 ↓1 6 too high 20 Enable SVG, WebP, and ICO Upload 10K+ · 4.6★ (11) wp.org #10 ↓1 10 too high 21 ThumbPress – Compress Images, Manage Thumbnails, Detect Image Issues, WebP/AVIF, Lazy Loading, Hotlinking & More 20K+ · 3.7★ (117) wp.org #21 ↓2 22 Free Assets Library – Openverse/Pixabay 600+ Million Images 4K+ · 4.4★ (11) wp.org #16 ↓1 6 too high 23 Image Prioritizer 40K+ · 5.0★ (1) wp.org #17 ↓1 6 too high 24 404 Image Redirection (Replace Broken Images) 500+ · 3.5★ (2) wp.org #22 2 too high

Merit ranking caps the install boost at 10M (wp.org leaves it uncapped), replaces the raw star average with a volume-weighted 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.