You've just updated your WordPress site. New text, new design: in short, your storefront shines brightly.
Except that on screen nothing changes. Your visitors continue to browse the previous version of your site, without you knowing it.
Frustrating, isn't it? This invisible discrepancy is probably due to the cache acting up.But rest assured, it is possible to regain control very simply, in just a few clicks.
For this you must clear the WordPress cacheDoes it seem complicated? This article explains the entire process, step by step.
After reading this, you will know what the cache is, why it sometimes blocks your updates, and most importantly, how to clear it effectively.
Get ready to get back an up-to-date, faster, and more reliable websiteAll guaranteed hassle-free.
What is the cache on WordPress and what is it used for?
We often hear about performance, but before pulling out the toolbox to clear the WordPress cache, it is essential to understand what is really going on under the hood of your website.
So what is the cache? It is...a temporary storage system for your files or datawhich allows your visitors to access it more quickly.
Basically, when your pages are cached, they are stored in memory which prevents your users from having to download them again each time they view them.
Technically, there are different types of cache:
- The page cache : the one generated by the cache extension you are using (WP Rocket, WP Fastest Cache, LiteSpeed Cache, W3 Total Cache, etc.).
- The object cache : it allows you to keep track of the queries made to your database.
- Browser cache (Chrome, Firefox, Edge, Opera, etc.): Static files remain on the user's computer for instant display upon return. The browser does not redownload images or scripts already present.
- Your hosting server cachewhich stores the final HTML rendering so as not to burden the processor with each visitor.
- The CDN cache, used by the CDN servers (Content Delivery Network(Content Delivery Network) that you use. A CDN refers to a set of interconnected servers around the world designed to load your pages faster.
Why and when should you clear the cache on WordPress?
Clearing the WordPress cache: a positive impact on speed, UX, and SEO
As you saw just before, a caching mechanism directly impacts the loading speed of your site.
This is a strong argument in favor of this type of system, but it's not the only one. Caching allows for:
- A performance improvementsince she This significantly reduces page load times by serving pre-generated static versions. The server is under less strain, requests are processed faster, and the user enjoys a smooth and immediate browsing experience.
- A better user experience (UX). A fast website reduces bounce rates and increases time spent on pages. Visitors find information more easily, view more content, and perceive your site as more professional and trustworthy.
- A positive impact on natural referencing (SEO). Loading speed is an important criterion for search engines. A cached WordPress site achieves better technical performance, which can help improve its ranking in search results and its overall visibility.
- A reduction in server load. The cache limits the number of PHP calculations and database queries. This allows for better handling of traffic spikes, prevents slowdowns, and reduces the risk of server failures or errors.
When the cache becomes capricious
However, a caching system can also become temperamental, especially when you modify your design.
You change a color or text, but nothing changes on the public side? This is the classic sign that your site is hiding the truth from you and that your changes remain invisible.
The browser insists on serving an old version even though the file has changed on the server.
This technical discrepancy between the files stored in memory and the current reality creates an immediate display inconsistency for the internet user.
Extension updates often cause this blockage. Sometimes, new code directly conflicts with the existing cache:
- After an update major plugin.
- Right after modifying the CSS code or the designn.
- Following a change in the menu structure.
In this case, it's necessary to clear the WordPress cache. That's exactly what you'll discover in the next section, with several detailed step-by-step methods.
How to clear the cache on WordPress using a plugin?
Are you still seeing your old design even though you just spent two hours modifying it? That's a classic WordPress webmaster problem!
Ignoring this technical step risks serving outdated content to your visitors, which can damage your credibility.
To clear the WordPress cache and force the display of your new content, most caching plugins include a "magic" button to clean up without touching the code.
Let's take a look at four of the most famous ones.
How to clear the WordPress cache with WP Rocket?
Let's start with WP Rocket, the most popular premium caching plugin in the WordPress ecosystem.
Active on over 5 million sites, it's very easy to use. Most of its settings are applied automatically as soon as you activate it on your WordPress back office.
With this program, caching is done automatically. To clear the cache, you must do it manually like this:
- Simply direct your gaze to the administration bar located at the very top.The plugin's dropdown menu is always accessible. It's the starting point for every action.
- Next, click on the heading “Clear and preload cache” in the available options.This drastic action instantly purges all pages stored on your site. Everyone will immediately see the most recent version of your content.
You can also target a single page using the “Clear this cache” button in the list of articles or pages. This is a great way to fix a typo without regenerating everything.
Did you know WP Rocket isn't just a caching plugin. Overall, it allows you to optimize the loading speed of your WordPress site thanks to multiple options. Feel free to use it to optimize your database, for example.
How to clear your WordPress site's cache with LiteSpeed Cache?
Let's now move on to the second caching plugin: LiteSpeedCacheIf WP Rocket is the star of premium caching plugins, LS Cache is its free equivalent on the official WordPress directory.
It looks like “An all-in-one website acceleration extension, including a proprietary server-level cache and a collection of optimization features.”
To clear the cache with this extension, follow the steps below:
- Go to the menu LiteSpeed Cache > Toolbox.
- Click on the “Purge All” boxIt's a drastic method, but it remains the most effective way to reset everything across the entire domain. Your visitors will no longer encounter an outdated version.
Note that this plugin also manages the database object cache. Sometimes you need to purge both separately for optimal results.
Tips LiteSpeed's exclusive features require one of the following: OpenLiteSpeed, LiteSpeed commercial products, LiteSpeed-optimized hosting, or QUIC.cloud CDN.
How to clear the cache with WP Super Cache?
WP Super Cache is the third plugin in our selection. This long-standing plugin from Automattic remains a cornerstone of the WordPress ecosystem.
To clear the WordPress cache with WP Super CacheSimply click on the "Purge cache" link at the top of your dashboard, in the menu bar.
The plugin has the unique feature of listing cached files.This allows you to physically see what is being deleted from the server. It's reassuring to see the real impact.
How to clear the WordPress cache with WP Fastest Cache?
Without further ado, let's move on to WP Fastest CacheWith this extension, the procedure is as follows:
- Hover your mouse over the “WP Fastest Cache” link located at the top of your administration interface.
- Click on "Clear all cache" to manually clear the cache on your entire WP site.
It's important to distinguish between clearing the regular cache and clearing the minified cache. The latter specifically targets the CSS and JS files that control the design. Don't overlook this option.
The interface stands out for its ease of daily use by webmasters.A simple checkbox can even automate this process when publishing or updating content:
How to clear your website's cache with W3 Total Cache?
Let's end with W3 Total Cache, a long-standing WordPress caching plugin known for its complex configuration.
It must be said that its "Performance" menu is full of technical options that can sometimes seem intimidating, due to its complex, almost convoluted appearance.
To put it simply, go to the Performance > Dashboard menu to configure the available caching types.
When that's done, select the "Purge all caches" option from the "Performance" menu:
The tool also allows you to specifically target the database cacheThis technique becomes useful if your recent articles stubbornly refuse to update.
After this comprehensive overview of how to clear the WordPress cache on popular caching plugins, let's move on to another method: clearing the cache at your web host.
How do I clear the WordPress cache on my web host?
Depending on the hosting provider you use, caching may already be integrated at the server level.
An example ? Server-side caching is often much more powerful and faster than traditional plugins.It intercepts requests even before WordPress loads.
The French hosting provider o2switchFor example, it offers several caching solutions:
- extreme cache, an advanced HTTP caching mechanism at the server level.
- Memcached and Redis, object caches to cache SQL query results.
On the side of KinstaThe hosting provider that Maintenance WP uses and recommends, the MyKinsta dashboard allows, for example, the application of object, server and CDN caching.
Like that, You no longer need to use a dedicated WordPress caching pluginActivation/deactivation is done in just a few clicks.
Depending on your hosting provider, cache purging will normally be done through its server administration interface (e.g., cPanel).
You need to actively search for a tab often named “Varnish” or “Nginx” in the settings. That's where you'll find the command to purge the entire system.
For more information, Consult the provided documentation or contact support. (user support) for additional information and help on the subject.
If you are a developer or have excellent technical skills, you can also use the WP-CLI command-line tool To clear the WordPress cache instantly, a single line of code is all it takes to reset everything.
How do I clear the cache in a web browser?
If, despite your efforts on the server side to clear the cache, nothing changes visually, your own computer is probably the culprit.
Local storage stubbornly retains old versions of your files to speed up your future browsing.
In this case, you need to clear your web browser's cache. The most widely used browser in France is Google Chrome.
So we're going to focus on him first here. To clear Chrome's cache, click on the three small dots to the right of your navigation bar..
Next, navigate to the "History" menu, then choose "Delete browsing data".
Choose a time period, such as "Last 15 minutes" or "Last 24 hours"Select the types of information you want to delete. Then click "Delete from this device".
Always remember to use private (or Incognito) browsing mode. using the keyboard shortcut Cmd + alt + N on Mac (or Ctrl + alt + N on PC)This is a powerful diagnostic test to determine whether the problem originates from your machine or the website. Because this mode doesn't use temporary files stored during your previous visits, it shows you the raw reality of the site.
Rest assured, this technical purge does not delete your passwords or active connections if you are careful not to check cookies or connection history. Only obsolete images, scripts, and temporary files are skipped..
Are you using other web browsers? Here's how to do it on Firefox (Mozilla) and safari (Manzana).
How do I clear my CDN cache?
Still here? Now it's time to see how to clear your CDN cache. As mentioned earlier in this article, a CDN works like a vast, complex network of servers distributed globally to optimize speed.
One of the most famous and widely used in the world is Cloudflare. It intelligently maintains static copies of your website in all corners of the globe.
Clearing the WordPress cache locally isn't always enough if this external layer persists. Your visitors then access data from the server closest to them.
To purge these remote files, first log in to your secure Cloudflare dashboard.
Next, locate the cache menu in the interface's main menu. Select Clear cache > Clear all items to clear everything at once.
The official Cloudflare extension It thankfully automates this often tedious technical procedure for administrators. It triggers an immediate purge as soon as you publish a new article on the site.
Please note that the effect is not always instantaneous across the entire global network. This propagation can sometimes take a few seconds to become fully effective worldwide. Therefore, patience is still required immediately after the cleanup operation.
What problems can occur because of the cache and how can they be solved?
Do you sometimes encounter a completely broken design when you view it? This is often due to a CSS file that isn't loading correctly. The link exists, but the source file is missing.
Shopping cart problems on e-commerce sites (type WooCommerce) are even more problematic for your revenue.
An overly aggressive cache can prevent products from being added or mix up user sessions.You then lose customers who technically cannot pay.
Temporarily disable the caching plugin to check if the problem persists. This is the best way to isolate the source of the bug.
Keep in mind the absolute necessity of cache exclusions for connected areas. Some dynamic pages must never be loaded into memory to function.
Mastering cache management on WordPress is an essential lever for reconciling technical performance and the freshness of your content.
If purging is necessary during updates, use it sparingly to preserve loading speed.This will ensure a smooth user experience while optimizing your site's SEO.
And in general, Always remember to back up your site. (files + database) before proceeding with any technical manipulation.
Are you experiencing a technical problem with your cache or would you simply like assistance in setting up this type of system on your WordPress site?
Available 7 days a week, our support team can respond to your needs with speed, professionalism and efficiency. Contact us for more information.
