wp.org search vs our merit ranking: “image optimization”

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 “image optimization”, we agree with wp.org on the top plugin, and our order differs from theirs on 10 of the top 20. 4 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 #6 but places #22 on merit, a gap of 16 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 #10 on merit, 4.8★ from 2617 reviews, but shows at wp.org #15. A smaller install base keeps it further down the default search order than its quality signals alone would.

merit plugin signals wp.org

Smush – Image Optimization, Compression, Lazy Load, WebP & CDN 1M+ · 4.8★ (6053) wp.org #1 2

Imagify Image Optimization: Optimize Images | Compress & Convert to WebP/AVIF 900K+ · 4.3★ (1656) wp.org #2 3

LiteSpeed Cache 7M+ · 4.8★ (2778) wp.org #3 4

EWWW Image Optimizer 1M+ · 4.8★ (1842) wp.org #4 5

Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization 200K+ · 4.7★ (640) wp.org #7 2 too low 6

Robin Image Optimizer – Unlimited Image Optimization, WebP & AVIF 100K+ · 4.4★ (131) wp.org #5 1 too high 7

ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF 300K+ · 4.5★ (830) wp.org #8 ↑1 1 too low 8

Modula Image Gallery – Photo Grid & Video Gallery 100K+ · 4.7★ (616) wp.org #9 ↑8 1 too low 9

Converter for Media – Optimize images | Convert WebP & AVIF 500K+ · 4.9★ (1106) wp.org #13 ↓3 4 too low 10

WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance 1M+ · 4.8★ (2617) wp.org #15 ↓4 5 too low 11

reSmush.it : The original free image compressor and optimizer plugin 100K+ · 4.3★ (166) wp.org #11 ↑2 12

Autoptimize 800K+ · 4.7★ (1428) wp.org #17 ↓3 5 too low 13

NitroPack – Performance, Page Speed & Cache Plugin for Core Web Vitals, CDN & Image Optimization 90K+ · 4.3★ (311) wp.org #19 6 too low 14

TinyPNG Image Optimization – Image Compression JPEG & PNG | Convert to WebP & AVIF 100K+ · 4.5★ (181) throws errorsnot PHP-current wp.org #12 2 too high 15

Elementor Website Builder – more than just a page builder 10M+ · 4.5★ (7323) not PHP-currentheavy footprint wp.org #20 5 too low 16

Resize Image After Upload 80K+ · 4.8★ (56) wp.org #23 ↑1 7 too low 17

ShortPixel Adaptive Images – WebP, AVIF, CDN, Image Optimization 10K+ · 4.8★ (145) throws errorsnot PHP-current wp.org #22 ↑1 5 too low 18

ThumbPress – Compress Images, Manage Thumbnails, Detect Image Issues, WebP/AVIF, Lazy Loading, Hotlinking & More 20K+ · 3.7★ (117) wp.org #24 ↓2 6 too low 19

SpeedyCache – Cache, Optimization, Performance 500K+ · 4.4★ (30) host-installed base wp.org #16 3 too high 20

Image Optimization For SEO 3K+ · 3.7★ (12) thin reviews wp.org #14 ↑1 6 too high 21

Compress, Resize & Lazy Load Images – WPvivid Image Optimization 10K+ · 4.3★ (7) thin reviews wp.org #18 ↑2 3 too high 22

Image Optimizer – Compress Images and Convert to WebP or AVIF 1M+ · 1.7★ (81) host-installed base wp.org #6 16 too high 23

Optimization Detective 60K+ · 4.3★ (3) thin reviews wp.org #10 ↑2 13 too high 24

Image Prioritizer 40K+ · 5.0★ (1) throws errorsnot PHP-current thin reviews wp.org #21 3 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.