Description
At a glance
Looking for Autoptimize v3.1.16? It is available here as a free GPL download for WordPress — 800K+ active installs · 4.7/5 rating from 1,428 reviews · updated September 26, 2026 · requires WordPress 5.3+ & PHP 7.4+.
Autoptimize makes optimizing your site really easy. It can aggregate, minify and cache scripts and styles, injects CSS in the page head by default but can also inline critical CSS and defer the aggregated full CSS, moves and defers scripts to the footer and minifies HTML. You can optimize and lazy-load images (with support for WebP and AVIF formats), optimize Google Fonts, async non-aggregated JavaScript, remove WordPress core emoji cruft and more. As such it can improve your site’s performance even when already on HTTP/2! There is extensive API available to enable you to tailor Autoptimize to each and every site’s specific needs.
If you think performance indeed is important, you should at least consider one of the many free page caching plugins (e.g. Speed Booster pack or KeyCDN’s Cache Enabler) to complement Autoptimize or even consider Autoptimize Pro which not only has page caching but also image optimization, CDN, critical CSS and more!
Autoptimize Pro
Autoptimize Pro is a premium Power-Up, adding image optimization, CDN, page caching, automatic critical CSS rules and extra “booster” options, all in one handy subscription to make your site even faster!!Premium Support
We provide great Premium Support and Web Performance Optimization services with Accelera, check out our offering on https://accelerawp.com/!
(Speed-surfing image under creative commons by LL Twistiti)
Frequently asked questions
What is Autoptimize?
Autoptimize is a free WordPress plugin available under the GPL license. The current version is 3.1.16. It is active on over 800K websites.
Is Autoptimize free to download?
Yes — Autoptimize 3.1.16 is a free GPL download with no hidden fees, no account needed, and no feature locked behind a paywall in this package. Users rate it 4.7 out of 5 based on 1,428 reviews.
How do I install Autoptimize 3.1.16?
Download the ZIP file from this page, then in your WordPress dashboard go to Plugins → Add New → Upload Plugin, choose the file, click Install Now, then Activate. The plugin works immediately after activation — no license key or extra setup is required for the core features.
What are the requirements for Autoptimize?
Autoptimize 3.1.16 requires WordPress 5.3 or higher and PHP 7.4 or higher. Most modern WordPress hosts already meet these versions. Running older versions may cause features to break, so update WordPress and PHP first if your site is behind.
When was Autoptimize last updated?
Version 3.1.16 was last updated on September 26, 2026. This page is refreshed automatically, so the download here always matches the newest version we have verified.
Is the Autoptimize download safe?
The file is sourced directly from the official WordPress.org repository — the same file the developer published. It is served unmodified, so what you install here is byte-identical to the official release.
Version: 3.1.16
Updated: October 1, 2026
Technical details
| Version | 3.1.16 |
|---|---|
| Last updated | September 26, 2026 |
| Active installs | 800,000+ |
| Rating | ★★★★★ 4.7/5 (1,428 reviews) |
| Requires WordPress | 5.3 or higher |
| Requires PHP | 7.4 or higher |
| Author | Optimizing Matters |
| Tags | core-web-vitals, images, optimize, pagespeed, performance |
Demo Autoptimize
Download Autoptimize
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