PageSpeed Ninja is the ultimate WordPress performance plugin. You can make your site load faster on desktop and mobile, fixing Google PageSpeed Insights issues with one click.
- Easily enable Gzip file compression
- Fix render blocking CSS and JavaScript
- Improve Critical Rendering Path and auto-generate above-the-fold critical CSS
- Minify HTML, JavaScript and CSS files
- Combine and inline Javascript and CSS
- Defer loading of Javascript and CSS
- Optimize style / script order
- Compress all images to optimize size
- Defer images by lazy loading with optional low-quality image placeholders
- Leverage browser caching and server-side caching
- Optimize your images accurately for nearly 10,000 different mobile browsers thanks to the included AMDD database – one of the most comprehensive mobile device databases available.
- And MUCH more, based on 10+ years of experience in mobile-optimizing over 200 000 websites.
Why PageSpeed Ninja?
We’ve been optimizing web on mobile for over a decade now (you might know one of our popular projects, Lazy Load XT on Github). PageSpeed Ninja for WordPress is the result of 10+ years of experience in optimizing the performance over 200 000 websites on mobile. We believe you won’t find a similar, easy to use, all-in-one package of performance boosting features anywhere else.
We’ve built heaps of unique features to make sure your site loads super fast, like the above-the-fold critical CSS generation method, not seen in any other plugins.
We’d love your feedback – always feel free to send us your questions, thoughts and suggestions.
Before you install
According to our stats, our plugin improves speed of 4 out of 5 sites. However in some cases, certain theme and plugin combinations (particularly related to caching and optimization) cause incompatibility issues. Therefore our plugin might not be suitable for everyone. In order for you to see how PageSpeed Ninja could work on your site, we created a simple tool where you can test your site before installation. We highly recommend you visit PageSpeed.Ninja and test your site beforehand.
Uninstallation
When the plugin is deleted, it will automatically revert all settings on your site back to way they were before installing this plugin. It restores all optimized images and removes /s directory with optimized JS and CSS files. Also all changes in .htaccess files are reverted back.
Please note that this restoration may not work reliably if in the meanwhile there have been any conflicts with other plugins, e.g. if the other plugins dynamically create/edit/remove files (including the files backed up by this plugin).
Feedback, Bug reports, Logging possible issues
We welcome all questions, comments, suggestions, issue reports. Contact us to be added to our private tester Facebook group.
Pagespeed Ninja logs all php errors in wp-content/plugins/pagespeedninja/includes/error_log.php file
If you find a problem, would be great if you can also send that file along.
New Versions
When a version of the plugin is released, you will be notified in the WP backend with an easy one-click update link.
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See improvement suggestions in one place and fix with single click -
Fine tune to get the best performance using advanced settings
- Upload the plugin files to the
/wp-content/plugins/pagespeed-ninjadirectory, or install the plugin through the WordPress plugins screen directly. We recommend taking a backup of your site first, just like with any other new plugin. - Activate the plugin through the ‘Plugins’ screen in WordPress
- Use the Settings->Pagespeed Ninja screen to configure the plugin
- After you have installed the plugin, navigate to Settings->PageSpeed Ninja and enable optimization levels suggested by Google’s PageSpeed Insights. By default all optimizations are disabled. The plugin then optimizes images, JS and CSS files, and modifies .htaccess files as required to fix issues identified by Google PageSpeed Insights.
- Installation Instructions
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- Upload the plugin files to the
/wp-content/plugins/pagespeed-ninjadirectory, or install the plugin through the WordPress plugins screen directly. We recommend taking a backup of your site first, just like with any other new plugin. - Activate the plugin through the ‘Plugins’ screen in WordPress
- Use the Settings->Pagespeed Ninja screen to configure the plugin
- After you have installed the plugin, navigate to Settings->PageSpeed Ninja and enable optimization levels suggested by Google’s PageSpeed Insights. By default all optimizations are disabled. The plugin then optimizes images, JS and CSS files, and modifies .htaccess files as required to fix issues identified by Google PageSpeed Insights.
- Upload the plugin files to the
- Does this plugin have any conflicts with Yoast or any of the other SEO plugins out there?
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The PageSpeed Ninja plugin should work pretty well with most other plugins without issues. However, if some SEO plugins try to do some of the same things as this plugin, then conflicts could be possible especially if gzip compression is enabled. However that is pretty unlikely.
“Pagespeed Ninja” is open source software. The following people have contributed to this plugin.
Contributors
۰٫۹٫۵ Beta Release [27 August 2017]
- Added optimization of srcset attribute in images
- Added support of HTTP/2 Server Push
- Fixed “Viewport width” feature
- Fixed “DNS prefetch” feature in the “Fast simple” HTML parser mode
- Fixed Google Font optimization
۰٫۹٫۴ Beta Release [23 July 2017]
- Added request to allow using of external pagespeed.ninja critical CSS service and to send usage data
- Removed update from versions prior to 0.8.23 (first public alpha release)
- Moved “Optimize Emoji loading” option to “Minify JavaScript” section
۰٫۹٫۳ Beta Release [03 July 2017]
- Fixed lazy image loading in the “stream” optimizer mode
- Improved settings page for small/medium screen width
- Colors of switches depend on diference between original and current scores
- Updated AMDD database
۰٫۹٫۲ Beta Release [20 June 2017]
- Added preview of results (without affecting website for other users)
- Added “Optimize Emoji Loading” feature
- Added “Google Fonts loading” feature
- Added “Skip first images” and “Noscript position” features to fine tune lazy image loading
- Added support of ImageMagick PHP extensions for image optimization
- Fixed processing of non-standard JPEG and PNG images
- Fixed CSS parser
- Fixed issue with merging of subsequent javascripts before
- Fixed merging of Javascript and CSS in the “stream” optimizer mode
- Fixed merging of Javascript and CSS with “onload” attribute
- Fixed processing of tags
- Fixed dnsprefetch generation
- Fixed timeout issue in the plugin activation
- Added set width and height attributes for lazy loading images
- Fixed loading of URLs starting with “//”
- Fixed settings page in older browsers
- Fixed several minor issues
- Improved performance of local above-the-fold css generation
- Google fonts are loaded synchronously by default
- Excluded Google Analytics from “Non-blocking Javascript” feature
- Default limits of inlined Javascript and CSS are set to 4096 bytes
۰٫۹٫۱ Beta Release [07 April 2017]
- Added “Clear Cache” and “Clear Database Cache” button to the Troubleshooting section
- Fixed Manage URLs feature in Troubleshooting section
- Fixed automatical cache clearing
۰٫۹٫۰ Beta Release [04 April 2017]
- New backend design
- “Troubleshooting” section in Advanced settings
- Fixed image lazy loading in “stream” html optimizer
- Fixed in-browser generation of above-the-fold css
- Fixed “Exclude files list” feature
- Added notification about unsaved changes
- Added notification about generated above-the-fold css
- Minor performance improvements
- Updated AMDD database
۰٫۸٫۲۷ Alpha Release [01 December 2016]
- Added server-side page caching implementation
- Fixed activation of image optimization and lazy loading settings
- Minor performance improvements
- Updated AMDD database
۰٫۸٫۲۶ Alpha Release [08 November 2016]
- Significant code refactoring
- Performance improvements
- Added “Experimental” preset
- Added loading animation for Google’s Pagespeed scores in backend
- Fixed PHP warnings in plugin activation/deactivation
- Fixed few Windows-related issues
- Removed “Avoid app install interstitials that hide content” section (removed by Google’s Pagespeed service)
- Moved image lazy loading settings to “Prioritize visible content” section
۰٫۸٫۲۵ Alpha Release [07 October 2016]
- Fixed few PHP warnings and notices
- Enabled logging for backend settings page and frontend pages only
- Added compatibility with caching plugins
- Added “Auto” option for “Load jQLight library” setting
- Other minor changes
۰٫۸٫۲۴ Alpha Release [04 October 2016]
- Added notice about compatibility with caching plugins
- Uninstall of the plugin deletes generated low-quality image placeholders and gzipped svg images
۰٫۸٫۲۳ Alpha Release [21 September 2016]
- Significant code refactoring
- Added error logging to includes/error_log.php
- Added “Low-quality image placeholders” setting
- Added “Vertical lazy loading threshold” setting
- Updated AMDD database
- Other minor changes
۰٫۸٫۲۲ Alpha Release [14 July 2016]
- First pre-public alpha release. Distributed privately.