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CSS Optimizer – Remove Unused CSS

v1.7

by wooncherk · updated 4 years ago

Clean up and remove unused CSS from your website. Also generates Critical CSS to improve PageSpeed Score.

autoptimizeCritical CSScssspeed
WordPress.org SaveAnalyze reviews Track this plugin
Rank
#16,570
Down35 vs yesterday
Active installs (est.)
≈ 115
100+ reported · High
Total downloads
11.1K
11,142 all-time
Rating
3.7/5
6 reviews
Support resolved
–
0 of 0 threads, last 2 months
Growing·Downloads +50% (30d)·Toward 200+ · ETA ~45d

CSS Optimizer at a glance

CSS Optimizer is a WordPress plugin by wooncherk with 100+ active installs, the #16,570 most popular plugin on WordPress.org. On a typical day it’s downloaded about 4 times, 50% more than the month before. It’s rated 3.7 out of 5 from 6 reviews. Version 1.7 came out on Mar 16, 2022, more than 4 years ago. It is tested up to WordPress 5.9.20. Among the 5 plugins tagged “autoptimize”, it ranks #3. It was first released in 2021.

Chart time range

Applies to every chart below. History from Oct 10, 2026, 30 days.

Showing the last 30 days. Full history comes with any paid plan.See plans

Downloads over time

Download stats

85 downloads · the last 30 days

Downloads over time
CSS Optimizer Compare series
Downloads over time: 24 days across 1 series.510Oct 10Oct 14Oct 18Oct 22Oct 25Oct 29Nov 2Oct 29, 2026: Tested up to 5.9.20
View as table
DateCSS Optimizer
Nov 2, 20267
Nov 1, 202611
Oct 31, 20264
Oct 30, 20261
Oct 29, 20264
Oct 28, 20264
Oct 27, 20264
Oct 26, 20267
Oct 25, 20263
Oct 24, 20263
Oct 23, 20262
Oct 22, 20261
Oct 21, 20261
Oct 20, 20262
Oct 19, 20262
Oct 18, 20263
Oct 17, 20263
Oct 16, 20264
Oct 15, 20264
Oct 14, 20262
Oct 13, 20264
Oct 12, 20261
Oct 11, 20262
Oct 10, 20266

Unusual spikes are usually updates, not new installs.

Estimated installs

≈ 115 · -0.9% in the last 30 days

Estimated installs
Estimated installs: 13 days across 1 series.114115116Oct 27Oct 29Oct 31Nov 2Nov 5Nov 7Nov 9Oct 29, 2026: Tested up to 5.9.20
View as table
DateEstimated installs
Nov 9, 2026115
Nov 8, 2026116
Nov 7, 2026115
Nov 5, 2026114
Nov 4, 2026116
Nov 3, 2026114
Nov 2, 2026114
Nov 1, 2026115
Oct 31, 2026114
Oct 30, 2026114
Oct 29, 2026114
Oct 28, 2026115
Oct 27, 2026116

Rank over time

#16,570 · up 28 in the last 30 days

Popular rank
Popular rank: 14 days across 1 series.#16.6K#16.6K#16.7K#16.7KOct 27Oct 29Oct 31Nov 2Nov 5Nov 7Nov 9Oct 29, 2026: Tested up to 5.9.20
View as table
DateDaily snapshot
Nov 9, 2026#16,570
Nov 8, 2026#16,535
Nov 7, 2026#16,601
Nov 6, 2026#16,646
Nov 5, 2026#16,643
Nov 4, 2026#16,542
Nov 3, 2026#16,629
Nov 2, 2026#16,610
Nov 1, 2026#16,590
Oct 31, 2026#16,644
Oct 30, 2026#16,634
Oct 29, 2026#16,690
Oct 28, 2026#16,601
Oct 27, 2026#16,598

Growth %

Average -0.07% a day in the last 30 days

Growth %, day over day
Growth %, day over day: 12 days across 1 series.-2%0%2%Oct 28Oct 30Nov 1Nov 3Nov 5Nov 7Nov 9
View as table
DateGrowth
Nov 9, 2026-0.86%
Nov 8, 2026+0.87%
Nov 7, 2026+0.44%
Nov 5, 2026-1.72%
Nov 4, 2026+1.75%
Nov 3, 20260.00%
Nov 2, 2026-0.87%
Nov 1, 2026+0.88%
Oct 31, 20260.00%
Oct 30, 20260.00%
Oct 29, 2026-0.87%
Oct 28, 2026-0.86%

Active installs band

100+ on WordPress.org

Active installs (rounded band)
Active installs (rounded band): 14 days across 1 series.95100105Oct 27Oct 29Oct 31Nov 2Nov 5Nov 7Nov 9Oct 29, 2026: Tested up to 5.9.20
View as table
DateDaily snapshot
Nov 9, 2026100+
Nov 8, 2026100+
Nov 7, 2026100+
Nov 6, 2026100+
Nov 5, 2026100+
Nov 4, 2026100+
Nov 3, 2026100+
Nov 2, 2026100+
Nov 1, 2026100+
Oct 31, 2026100+
Oct 30, 2026100+
Oct 29, 2026100+
Oct 28, 2026100+
Oct 27, 2026100+

Search rankings

Where it appears in WordPress.org search for the searches you track, checked every day.

See where CSS Optimizer ranks in search

Track this plugin to check its position for the searches you choose, daily, with an alert when it moves.

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Change log

From our daily snapshot of WordPress.org
  1. Rank #16601 → #16643
    • Tested up to 5.9.19 → 5.9.20

Versions in use

Share of active installs on each published version, from WordPress.org.

  • v1.7100%

Rating trend

3.7★★★★★6 reviews · steady in the last 30 days

Requirements & info

Version history
Version
1.7
Requires WordPress
4.7
Tested up to
5.9.20
Requires PHP
5.1
First released
Nov 4, 2021
Last updated
Mar 16, 2022
Releases, last 12 months
…

Questions about CSS Optimizer

How many websites use CSS Optimizer?

CSS Optimizer is active on 100+ WordPress sites, as WordPress.org reports it. WordPress.org rounds the number down, so the real count is somewhat higher. That makes it the #16,570 most popular plugin on WordPress.org.

How many times has CSS Optimizer been downloaded?

11,142 times in total since 2021. On a typical day it’s downloaded about 4 times. See download stats

When was CSS Optimizer last updated?

Version 1.7 came out on Mar 16, 2022 (4 years ago).

Is CSS Optimizer compatible with the latest WordPress?

CSS Optimizer’s readme says it’s tested up to WordPress 5.9.20, while the current version is 7.1. That doesn’t mean it breaks, but its author hasn’t confirmed it works with the latest releases.

Is CSS Optimizer still maintained?

Its last release was 4 years ago, so it may no longer be actively maintained. No support threads were opened in the last two months.

What rating does CSS Optimizer have?

3.7 out of 5 from 6 reviews on WordPress.org. 67% of them give 5 stars.

What are the best alternatives to CSS Optimizer?

The plugins most like CSS Optimizer, by the tags they share, are Jetpack Boost (200K+), Speed Optimizer (1M+) and Simple Custom CSS Plugin (100K+). Compare all alternatives

Latest reviews

Analyze reviews
All reviews on WordPress.org

Review stats

3.7

★★★★★

6 reviews

  • 5 stars: 4 reviews, 67%
  • 4 stars: 0 reviews, 0%
  • 3 stars: 0 reviews, 0%
  • 2 stars: 0 reviews, 0%
  • 1 stars: 2 reviews, 33%
Positive
67%4–5★
Mixed
0%3★
Critical
33%1–2★
  • About 1 more 5★ reviews would lift it to 3.8.
  • Each new 1★ review takes 2 five-star reviews to balance out.

Compare with competitors

Add up to 1 competitor. No account needed.

Starter · 1 competitor
CSS Optimizer
Suggested:
Metric
CSS Optimizer
Estimated installs≈ 115
Reported installs100+
Rating3.7
Reviews6
Total downloads11.1K
Authorwooncherk
First releasedNov 4, 2021
Version1.7
Requires WP4.7
Requires PHP5.1
Last updatedMar 16, 2022

Alternatives to CSS Optimizer

Compare all alternatives

Popular plugins with the same tags, the most in common first.

Side by side:CSS Optimizer vs Jetpack BoostCSS Optimizer vs Speed OptimizerCSS Optimizer vs Simple Custom CSS Plugin