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wp.org search vs our merit ranking: “pdf conversion”

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 conversion”, we agree with wp.org on the top plugin, and our order differs from theirs on 12 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

Free PDF to Flipbook shows at wp.org #5 but places #20 on merit, a gap of 15 places. Its 500+ 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

EmbedPress places #8 on merit, 4.8★ from 307 reviews, but shows at wp.org #14. A smaller install base keeps it further down the default search order than its quality signals alone would.

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 DearFlip – PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer 200K+ · 4.9★ (194) wp.org #1 2 Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder 600K+ · 4.9★ (4515) wp.org #2 3 Forminator Forms – Contact Form, Payment Form & Custom Form Builder 600K+ · 4.8★ (2144) wp.org #8 ↑2 5 too low 4 Real3D Flipbook – 3D Flipbook, PDF Flipbook, PDF Viewer, PDF Embedder 10K+ · 4.5★ (11) wp.org #3 1 too high 5 Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder 800K+ · 4.8★ (808) wp.org #10 ↓2 5 too low 6 Booster for WooCommerce – PDF Invoices, Abandoned Cart, Variation Swatches & 100+ Tools 30K+ · 4.6★ (535) wp.org #11 ↓2 5 too low 7 Conversios – GA4, Google Ads & Meta Conversion Tracking with Product Feed for WooCommerce 10K+ · 4.3★ (206) wp.org #9 ↑2 2 too low 8 EmbedPress 100K+ · 4.8★ (307) wp.org #14 ↑5 6 too low 9 Flexible PDF Invoices for WooCommerce & WordPress 6K+ · 4.4★ (37) wp.org #7 2 too high 10 EWWW Image Optimizer 1M+ · 4.8★ (1843) wp.org #16 ↑1 6 too low 11 Save as PDF Plugin by PDFCrowd 1K+ · 4.1★ (27) wp.org #6 5 too high 12 MonsterInsights – Google Analytics Dashboard for WordPress (Website Stats Made Easy) 2M+ · 4.5★ (3157) wp.org #17 ↑1 5 too low 13 Flipbook PDF Viewer & Embedder 300+ · 5.0★ (6) wp.org #4 9 too high 14 Redirection for Contact Form 7 200K+ · 4.7★ (275) wp.org #20 ↑1 6 too low 15 Speed Optimizer – The All-In-One Performance-Boosting Plugin 1M+ · 4.2★ (641) wp.org #15 ↓3 16 Ultra Addons for Contact Form 7 60K+ · 4.8★ (108) wp.org #21 ↓1 5 too low 17 Flexible PDF Coupons – Gift Cards & Vouchers for WooCommerce 2K+ · 4.7★ (31) wp.org #18 ↓2 1 too low 18 Export WordPress Pages to Static HTML & PDF — Static Site Export 4K+ · 3.8★ (51) wp.org #22 4 too low 19 ImageRecycle pdf & image compression 1K+ · 4.5★ (26) wp.org #24 5 too low 20 Free PDF to Flipbook 500+ · 5.0★ (2) wp.org #5 15 too high 21 PDF Generator for WordPress Elementor 1K+ · 3.6★ (23) wp.org #19 ↓4 2 too high 22 Rapls PDF Image Creator – PDF Thumbnails & Featured Images 100+ · 5.0★ (3) wp.org #12 ↑1 10 too high 23 Posts to PDF – Backend Batch Export 200+ · 5.0★ (1) wp.org #13 ↑1 10 too high 24 HTML to PDF Converter 70+ · 3.0★ (2) wp.org #23 1 too high

Merit ranking caps the install boost at 10M (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.