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Best WordPress Plugins for Making Sites Fast with Conversions

9 plugins compared · Updated September 2026 · Performance & Speed

Choosing a WordPress plugin for making sites fast comes down to a few things: whether it is still actively maintained, whether real users rate it well, and whether it does the specific job you need without dragging the rest of the site down.

We ranked 9 plugins using our WPScore, which weighs the user rating (adjusted for how many people actually rated it), how many sites run it, how recently it was updated, and which WordPress version it is tested against. 9 of them have enough public data to be scored; the rest are listed below the ranked block, clearly marked, rather than being given a number we cannot justify.

How this list is funded. Some links here earn us a commission if you buy. It costs you nothing extra, and it does not move anything up the list — the order comes from the WPScore, which is calculated from public ratings, install counts and update history. See the method.

At a glance

  1. 1. Optimole Best overall 89/100
  2. 2. Speed Optimizer 85/100
  3. 3. LWS Optimize 85/100
  4. 4. Nelio A/B Testing 84/100
  5. 5. Squeeze 82/100
  6. 6. Personizely 76/100
  7. 7. Soovex WebP Converter 76/100
  8. 8. Capturly 67/100
  9. 9. Website Optimization 65/100
1 Optimole
Best overall Free by Optimole

Optimole

Automatically optimize images with bulk compression, lazy loading, WebP/AVIF conversion & CloudFront image CDN. Boost Core Web Vitals & conversions.

4.7★
from 638 ratings
200k+
active installs
Updated
Aug 2026
Tested to
WP 7.1
89

WPScore

Read review View on WordPress.org
2 Speed Optimizer
Free by SiteGround

Speed Optimizer

Boost your website performance and page speed, and increase conversions with powerful caching, frontend, media, and environment optimizations.

4.2★
from 639 ratings
1M+
active installs
Updated
Aug 2026
Tested to
WP 7.1
85

WPScore

Read review View on WordPress.org
3 LWS Optimize
Free by Aurélien LWS

LWS Optimize

All-in-one speed optimization: caching, WebP/AVIF, Critical CSS, lazy loading, CDN, and more. Instantly boost Core Web Vitals and site speed!

4.6★
from 9 ratings
20k+
active installs
Updated
Aug 2026
Tested to
WP 7.0.4
85

WPScore

Read review View on WordPress.org
4 Nelio A/B Testing
Free by Nelio Software

Nelio A/B Testing

A/B Testing, conversion rate optimization, and beautiful Heatmaps with AI Assistance.

4.8★
from 97 ratings
4k+
active installs
Updated
Aug 2026
Tested to
WP 7.1
84

WPScore

Read review View on WordPress.org
5 Squeeze
Free by Bogdan Bendziukov

Squeeze

Compress images in WordPress & convert to WebP — no API key, no quotas, no cloud. Unlimited local image optimizer; private browser-side compression.

5★
from 6 ratings
3k+
active installs
Updated
Aug 2026
Tested to
WP 7.1
82

WPScore

Read review View on WordPress.org
6 Personizely
Free by Sergiu Cazac

Personizely

Personizely is a Conversion Optimization Toolkit that helps you boost engagement and sales through A/B testing, website personalization, and popups.

4.8★
from 25 ratings
300+
active installs
Updated
Mar 2026
Tested to
WP 6.9.7
76

WPScore

Read review View on WordPress.org
7 Soovex WebP Converter
Free by Soovex IT Agency

Soovex WebP Converter

Convert WordPress images to WebP automatically. Optimize page speed, boost SEO, and reduce bandwidth with unlimited conversions and smart backups.

5★
from 1 ratings
100+
active installs
Updated
Aug 2026
Tested to
WP 7.0.4
76

WPScore

Read review View on WordPress.org
8 Capturly
Free by Capturly

Capturly

Enables Capturly visitor analytics, session replay, conversion funnel and heatmap tracking on your WordPress website.

5★
from 1 ratings
100+
active installs
Updated
Sep 2025
Tested to
WP 6.8.8
67

WPScore

Read review View on WordPress.org
9 Website Optimization
Free by Plerdy

Website Optimization

Optimize your website with Plerdy by analyzing traffic sources, scroll depth, user clicks, and usability to enhance conversion and strategy.

5★
from 6 ratings
1k+
active installs
Updated
Jul 2025
Tested to
WP 6.6.7
65

WPScore

Read review View on WordPress.org