wp.org search vs our merit ranking: “pdf 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 “pdf optimization”, we agree with wp.org on the top plugin, and our order differs from theirs on 13 of the top 20. 3 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

PDF Embed Block – share documents right inside your posts shows at wp.org #10 but places #22 on merit, a gap of 12 places. Its 4K+ installs carry it up the search order; its 5.0★ average from 2 reviews, plus freshness and upkeep, place it lower on our volume-weighted scale.

Buried gem

ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF places #11 on merit, 4.5★ from 830 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.

merit plugin signals wp.org

Imagify Image Optimization: Optimize Images | Compress & Convert to WebP/AVIF 900K+ · 4.3★ (1656) wp.org #1 2

PDF & Print by BestWebSoft – WordPress Posts and Pages PDF Generator Plugin 9K+ · 3.9★ (102) wp.org #3 1 too low 3

EWWW Image Optimizer 1M+ · 4.8★ (1842) wp.org #7 4 too low 4

Forminator Forms – Contact Form, Payment Form & Custom Form Builder 600K+ · 4.8★ (2143) wp.org #9 ↑1 5 too low 5

Pdf Embed 10K+ · 5.0★ (6) thin reviews wp.org #2 3 too high 6

Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization 200K+ · 4.7★ (640) wp.org #12 6 too low 7

Real3D Flipbook – 3D Flipbook, PDF Flipbook, PDF Viewer, PDF Embedder 10K+ · 4.5★ (11) thin reviews wp.org #4 3 too high 8

3D FlipBook – PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery 70K+ · 4.8★ (182) wp.org #13 5 too low 9

Print, PDF & Email by PrintFriendly 20K+ · 3.8★ (237) throws errorsnot PHP-current wp.org #6 3 too high 10

PDF Builder for WooCommerce. Create invoices,packing slips and more 2K+ · 4.7★ (145) wp.org #11 1 too low 11

ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF 300K+ · 4.5★ (830) wp.org #18 7 too low 12

Speed Optimizer – The All-In-One Performance-Boosting Plugin 1M+ · 4.2★ (641) wp.org #15 3 too low 13

PDF Generator for WordPress 1K+ · 4.6★ (39) throws errorsnot PHP-current wp.org #8 5 too high 14

PDF Forms Filler for CF7 3K+ · 4.8★ (13) throws errorsnot PHP-current thin reviews wp.org #5 9 too high 15

WP Compress – Instant Performance & Speed Optimization 9K+ · 4.5★ (155) wp.org #17 2 too low 16

Generate PDF using Contact Form 7 4K+ · 4.7★ (40) wp.org #14 2 too high 17

Booster for WooCommerce – PDF Invoices, Abandoned Cart, Variation Swatches & 100+ Tools 30K+ · 4.6★ (535) throws errorsnot PHP-current wp.org #24 7 too low 18

WPSpeed – WordPress Speed, Cache & Performance Optimization (Core Web Vitals, PageSpeed 100) 2K+ · 4.9★ (40) wp.org #23 5 too low 19

E2Pdf – Export Pdf Tool for WordPress 10K+ · 4.7★ (59) throws errorsnot PHP-current wp.org #19 20

ImageRecycle pdf & image compression 1K+ · 4.5★ (26) wp.org #20 21

MxChat – AI Chatbot & Content Generation for WordPress 2K+ · 5.0★ (31) throws errorsnot PHP-current wp.org #21 22

PDF Embed Block – share documents right inside your posts 4K+ · 5.0★ (2) thin reviews wp.org #10 ↓1 12 too high 23

Free PDF to Flipbook 500+ · 5.0★ (2) thin reviews wp.org #16 7 too high 24

Posts to PDF – Backend Batch Export 200+ · 5.0★ (1) thin reviews wp.org #22 2 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.