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Best Free WordPress Plugins for Optimize Images

15 plugins compared · Updated August 2026 · Optimize Images

All 15 Free only Premium only

Choosing a WordPress plugin for optimize images 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 15 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. 15 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. WP-Optimize Best overall 95/100
  2. 2. EWWW Image Optimizer 94/100
  3. 3. Smush 93/100
  4. 4. Converter for Media 93/100
  5. 5. Imagify Image Optimization: Optimize Images 89/100
  6. 6. ShortPixel Image Optimizer 89/100
  7. 7. Optimole 89/100
  8. 8. Perfect Images: Regenerate Thumbnails, Image Sizes, WebP & A... 88/100
  9. 9. Robin Image Optimizer 86/100
  10. 10. Kraken.io Image Optimizer 83/100
  11. 11. Compress, Resize & Lazy Load Images 83/100
  12. 12. Foxtool All-in-One: Contact chat button, Custom login, Media... 83/100
  13. 13. Squeeze 82/100
  14. 14. Infinite Uploads 79/100
  15. 15. PixelCraft with WebP 79/100
1 WP-Optimize
Best overall Free by David Anderson / Team Updraft

WP-Optimize

Get caching and more with this powerful cache plugin. Cache, optimize images, clean your database and minify for maximum performance.

4.8★
from 2,606 ratings
1M+
active installs
Updated
Aug 2026
Tested to
WP 7.1
95

WPScore

Read review View on WordPress.org
2 EWWW Image Optimizer
Free by Shane Bishop

EWWW Image Optimizer

Comprehensive image optimization with WebP, AVIF, Lazy Load, and more. Optimize images automatically for Faster Sites and Happy Visitors.

4.8★
from 1,838 ratings
1M+
active installs
Updated
Aug 2026
Tested to
WP 7.1
94

WPScore

Read review View on WordPress.org
3 Smush
Free by WPMU DEV - Your All-in-One WordPress Platform

Smush

Compress and optimize images, enable lazy load, serve WebP & AVIF, and speed up your site with a global image CDN.

4.8★
from 6,051 ratings
1M+
active installs
Updated
Aug 2026
Tested to
WP 7.1
93

WPScore

Read review View on WordPress.org
4 Converter for Media
Free by Mateusz Gbiorczyk

Converter for Media

Speed up your website by using our WebP & AVIF Converter. Optimize images and serve WebP and AVIF images instead of standard formats!

4.9★
from 1,097 ratings
500k+
active installs
Updated
Aug 2026
Tested to
WP 7.1
93

WPScore

Read review View on WordPress.org
7 Optimole
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
9 Robin Image Optimizer
Free by Themeisle

Robin Image Optimizer

Unlimited automatic image optimization for WordPress. Compress images, convert to WebP, and improve site speed without losing image quality.

4.4★
from 129 ratings
100k+
active installs
Updated
Aug 2026
Tested to
WP 7.1
86

WPScore

Read review View on WordPress.org
10 Kraken.io Image Optimizer
Free by Kraken.io

Kraken.io Image Optimizer

Optimize images automatically — compress, resize and convert to WebP, AVIF & more with Kraken.io. Faster pages, smaller files, same quality.

4.5★
from 119 ratings
10k+
active installs
Updated
Jun 2026
Tested to
WP 7.0.4
83

WPScore

Read review View on WordPress.org
13 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
14 Infinite Uploads
Free by Infinite Uploads

Infinite Uploads

The all-in-one media library for WordPress. Optimize images, reclaim storage, and manage a growing library with ease.

4.4★
from 19 ratings
800+
active installs
Updated
Aug 2026
Tested to
WP 7.1
79

WPScore

Read review View on WordPress.org
15 PixelCraft with WebP
Free by Secil Kars

PixelCraft with WebP

Automatically convert JPG and PNG images to WebP, reduce file sizes and speed up your WordPress website.

5★
from 3 ratings
500+
active installs
Updated
Jul 2026
Tested to
WP 7.0.4
79

WPScore

Read review View on WordPress.org