by David Clough 4.7 (102 reviews)

Async JavaScript

Name: Async JavaScript
Rating: 4.7 (102 reviews)
Author: David Clough

Async Javascript lets you add 'async' or 'defer' attribute to scripts to exclude to help increase the performance of your WordPress website.

Async JavaScript ranks #620 among WordPress.org plugins with 60,000+ active installations, is #43 of 1,658 in the Performance category, a 4.7/5 rating from 102 reviews, and was last updated Jun 22, 2023. Data from WordPress.org, refreshed twice daily — see methodology.

Tested up to WP 6.2.15 (Current: 7.1.4)

v2.21.08.31 Current Version v2.21.08.31

Updated 3 years ago Last Update on 22 Jun, 2023

Refreshed 18 hours ago Last Refreshed on

#43 of 1,658 in Performance Top 1% by installs Downloads -33.4% this week No update in over a year

View on WordPress.org

Rank

#620

— No change

Active Installs

60K+

-15.3%

KW Avg Position

63.5

0.5 worse

Downloads

2.1M

+19 today

Support Resolved

— No change

Rating

94%

Review 4.7 out of 5

4.7 (102 reviews)

Next Milestone 70K

Total Progress 94.8%

60K+ 70K+

Ranks to Climb

Growth Needed

8,000,000

Active Installs

Pro

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Rank Changes

Current #620

Change

Best #

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Active Installs Growth

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Active Installs 0,000,000+

Growth +0.0%

Peak 0,000,000

Downloads Growth

Downloads

Growth

Peak

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Reviews & Ratings

4.7

102 reviews

Overall 94%

90 (88%)

4 (4%)

1 (1%)

2 (2%)

5 (5%)

Security History

Source: WPVulnerability

7 known vulnerabilities on record · 1 in the last 24 months · checked 1 week ago

Oct 18, 2025

Async JavaScript [async-javascript] < 2.20.02.27

CVE-2020-36854 · Fixed in v2.20.02.27
Jun 29, 2021

Async JavaScript [async-javascript] < 2.21.06.29

Fixed in v2.21.06.29
Jun 13, 2021

Async JavaScript [async-javascript] < 2.21.06.29

Fixed in v2.21.06.29
Feb 27, 2020

Async JavaScript [async-javascript] < 2.20.02.27

CVE-2020-36854 · Fixed in v2.20.02.27
Feb 27, 2020

Async JavaScript [async-javascript] < 2.20.02.27

Fixed in v2.20.02.27
Async JavaScript [async-javascript] < 2.20.02.27

Fixed in v2.20.02.27
Async JavaScript [async-javascript] < 2.21.06.29

Fixed in v2.21.06.29

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Plugin Details

Version: 2.21.08.31
Last Updated: Jun 22, 2023
Requires WP: 4.6+
Tested Up To: 6.2.15
PHP Version: N/A
Author: David Clough

Support & Rating

Rating: ★ ★ ★ ★ ★ 4.7
Reviews: 102
Support Threads: 0
Resolved: 0%

Keywords

async javascript pagespeed performance render blocking

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TL;DR

AI summary of the plugin's readme

This plugin is for WordPress site owners who want to control how their scripts load. It solves render-blocking JavaScript by letting users add 'async' or 'defer' attributes to scripts, or exclude scripts entirely, to improve page speed and user experience.

Add async attribute to scripts
Add defer attribute to scripts
Exclude scripts from processing
Eliminates render-blocking JavaScript
Improves page speed

Frequently Asked Questions

Common questions about Async JavaScript

The 'async' attribute is new in HTML5. It is supported by the following browsers: Chrome IE 10 and higher Firefox 3.6 and higher Safari Opera

Async JavaScript is supported via the wordpress.org support forum.

We offer premium services for Async JavaScript and full web performance optimization services at https://autoptimize.com/

As the name implies, Async JavaScript is built to enhance JavaScript loading only. Async JavaScript does not have any impact on CSS. We recommend using the awesome Autoptimize plugin alongside Async JavaScript for CSS optimization.

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