You’ve just updated your WordPress site. New text, new design: in short, your showcase is shining bright.
Except nothing changes on screen. Your visitors continue browsing the previous version of your site without you knowing it.
Frustrating, isn’t it? This invisible delay is probably the cache acting up. But don’t worry, you can take back control very easily, in just a few clicks.
To do this, you need to clear the WordPress cache. Does that sound complicated? This article explains the entire process, step by step.
After reading it, you’ll know what the cache is, why it sometimes prevents your updates from appearing, and above all how to purge it effectively.
Get ready to restore an up-to-date, faster, and more reliable site. All guaranteed without the hassle.
What is the cache in WordPress and what is it used for?
We often hear about performance, but before pulling out the toolbox to clear the WordPress cache, it’s 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 data, which allows your visitors to access them more quickly.
Basically, when your pages are cached, they are stored in a memory that prevents your users from having to download them again each time they view them.
Technically, there are different types of cache:
- Page cache: the one generated by the caching plugin you use (WP Rocket, WP Fastest Cache, LiteSpeed Cache, W3 Total Cache, etc.).
- Object cache: it keeps the queries made to your database in memory.
- Browser cache (Chrome, Firefox, Edge, Opera, etc.): static files remain on the user’s computer for instant display when they return. The browser does not download images or scripts that are already present again.
- Your hosting server’s cache, which stores the final HTML rendering so the processor does not have to be called on for every visitor.
- CDN cache, used by the servers of the CDN (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 have just seen, a caching mechanism directly impacts your site’s loading speed.
That is a strong argument in favor of this type of system, but it is not the only one. Caching makes it possible to:
- A performance improvement, since it greatly reduces page loading time by serving pre-generated static versions. The server is under less strain, requests are processed faster, and users enjoy smooth, immediate browsing.
- A better user experience (UX). A fast site reduces the bounce rate and increases the time spent on pages. Visitors find information more easily, view more content, and perceive your site as more professional and more reliable.
- A positive impact on organic search visibility (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 the results and its overall visibility.
- A reduction in server load. The cache limits the number of PHP calculations and database queries. This makes it easier to manage traffic peaks, avoid slowdowns, and reduce the risk of outages or server errors.
When the cache becomes temperamental
However, a caching system can also become temperamental, especially when you modify your design.
You change a color or some 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 stubbornly keeps serving an old version even though the file has changed on the server.
This technical gap between the files stored in memory and the current reality creates an immediate display inconsistency for the web user.
Plugin updates often cause this issue. Sometimes, new code directly conflicts with the existing old cache:
- After a major plugin update.
- Immediately after modifying the CSS code or the design.
- Following a change in the menu structure.
In this case, it is necessary to clear the WordPress cache. That is exactly what you will discover in the next section, with several step-by-step detailed methods.
How to clear the cache on WordPress with a plugin?
Are you still seeing your old design even though you just spent two hours modifying it? It’s a WordPress webmaster classic!
Skipping this technical step means risking serving outdated content to your visitors, which can damage your credibility.
To clear the WordPress cache and force your new content to display, most cache plugins include a “magic” button to clean things 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 cache plugin in the WordPress ecosystem.
Active on more than 5 million sites, it is very easy to use. Most of its settings are applied automatically as soon as you activate it in your WordPress back office.
With it, caching happens automatically. To purge the cache, you need to do it manually like this:
- Simply direct your attention to the admin bar located at the very top. The plugin’s drop-down menu is always accessible there. This is the starting point for any action.
- Then click the item “Clear and preload cache” in the available options. This drastic action instantly purges all the pages stored on your site. Everyone will immediately see the most recent version of your content.
You can also target a single page via the “Clear this cache” button in the list of posts or pages. It’s a highly effective trick for correcting a typo without regenerating everything.
Did you know ? WP Rocket is not just a cache plugin. Overall, it helps 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?
Now let’s move on to cache plugin no. 2: LiteSpeedCache. While WP Rocket is the star of premium cache plugins, LS Cache is its free equivalent in the official WordPress directory.
It presents itself as “an all-in-one site acceleration plugin, featuring an exclusive server-level cache and a collection of optimization features.”
To clear the cache with this plugin, follow the steps below:
- Go to the LiteSpeed Cache > Toolbox menu.
- Click the “Purge All” tile. It’s a drastic method, but it remains the most effective way to reset everything across the entire domain. Your visitors will no longer end up on an outdated version.
Note that this plugin also manages the database object cache. Sometimes you need to purge both separately for the best result.
Good to know: LiteSpeed’s exclusive features require one of the following: OpenLiteSpeed, commercial LiteSpeed products, LiteSpeed-optimized hosting, or QUIC.cloud CDN.
How do you clear the cache with WP Super Cache?
WP Super Cache is the third contender in our selection. This long-standing plugin from Automattic remains a pillar of the WordPress ecosystem.
To clear the WordPress cache with WP Super Cache, simply click the “Purge Cache” link at the top of your dashboard, in the menu bar.
The plugin has the distinctive feature of listing cached files. This gives you the ability to physically see what is being deleted from the server. It’s reassuring to see the real impact.
How do you clear the WordPress cache with WP Fastest Cache?
Without further ado, let’s now move on to WP Fastest Cache. With this plugin, the steps to follow are as follows:
- Hover your mouse over the “WP Fastest Cache” link located at the top of your admin interface.
- Click “Clear all cache” to manually clear the cache across your entire WP site.
It’s important to clearly distinguish between clearing the standard cache and clearing the minified cache. The latter specifically concerns the CSS and JS files that control the design. Don’t overlook this option.
The interface stands out for how easy it is for webmasters to use on a daily basis. A simple checkbox even lets you automate this process when publishing or updating content:
How do you clear your site’s cache with W3 Total Cache?
Let’s finish with W3 Total Cache, a long-standing WordPress cache plugin known for the complexity of its settings.
It has to be said that its “Performance” menu is packed with technical options that can sometimes seem intimidating because of its bloated feel.
To keep things simple, go to the Performance > Dashboard menu to configure the available caching types.
Once that’s done, select the “Purge all caches” option from the “Performance” menu:
The tool also lets you specifically target the database cache. This action becomes useful if your recent posts 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: purging the cache at your web host.
How do you clear the WordPress cache at your host?
Depending on the host you use, caching may already be built in at the server level.
An example? Server-side caching, often much more powerful and faster than traditional plugins. It intercepts requests before WordPress even loads.
The French host o2switch, for example, offers several caching solutions:
- xtrem Cache, an advanced HTTP caching mechanism at the server level.
- Memcached and Redis, object caches for caching SQL query results.
As for Kinsta, the host that Maintenance WP uses and recommends, the MyKinsta dashboard allows you, for example, to apply object, server, and CDN caching.
This way, you no longer need to use a dedicated WordPress caching plugin. Activation/deactivation can be done in just a few clicks.
Depending on your host, cache purging will normally be done through its server administration interface (e.g., cPanel).
You should actively look for a tab often named “Varnish” or “Nginx” in the settings. That is where the command to purge the entire system is located.
To learn more, consult the documentation provided or contact support (user assistance) for additional information and help on the subject.
If you are a developer or have excellent technical foundations, you can also use the WP-CLI command-line tool to clear the WordPress cache instantly. A single line of code is enough to reset everything.
How do you clear the cache in a web browser?
If, despite your server-side efforts to clear the cache, nothing changes visually, your own computer is probably the culprit.
Local storage stubbornly keeps old versions of your files to speed up your future browsing.
In this case, you need to clear your web browser’s cache. The one most used in France by internet users is Google Chrome.
So we’ll focus on it first here. To clear Chrome’s cache, click the 3 small dots to the right of your navigation bar.
Then, navigate to the “History” menu, then choose “Delete browsing data”.
Choose a time range, such as “Last 15 minutes” or “Last 24 hours”. Select the types of information you want to delete. Then click “Delete from this device”.
Also systematically think about private browsing mode (or Incognito) with the keyboard shortcut Cmd + alt + N on Mac (or Ctrl + alt + N on PC). It’s a powerful diagnostic test to check whether the problem comes from your machine or from the site. Since this mode does not use the 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 your active sessions, as long as you are careful not to check cookies or login history. Only images, scripts, and obsolete temporary files are removed.
Do you use other web browsers? Here is the procedure to follow for Firefox (Mozilla) and Safari (Apple).
How do you clear your CDN cache?
Are you still there? It is now 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 worldwide to optimize speed.
One of the most famous and most widely used in the world is Cloudflare. It intelligently stores static copies of your site all over the planet.
Clearing the WordPress cache locally is not always enough if this external layer persists. Your visitors therefore access the data from the server closest to them.
To purge these remote files, first log in to your secure Cloudflare dashboard.
Next, locate the cache-related menu in the interface’s main menu. Select Clear cache > Clear everything to clean it all in one go.
The official Cloudflare plugin fortunately 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 before it is fully effective everywhere in the world. So patience is still required right after the cleanup operation.
What problems can occur because of the cache and how can you fix them?
Do you sometimes come across a completely “broken” design on display? This is often due to a CSS file that is not loading properly. The link exists, but the source file cannot be found.
Cart issues on e-commerce sites (such as 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 are technically unable to pay.
Temporarily disable the cache plugin to check whether 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 logged-in areas. Some dynamic pages must never be cached in order to work.
Mastering cache management on WordPress is an essential lever for combining technical performance with the freshness of your content.
If purging proves 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 carrying out any technical operation.
Are you experiencing a technical issue with your cache or simply want support in setting up this type of system on your WordPress site?
Available 7 days a week, our support team can respond to your needs quickly, professionally, and efficiently. Contact us to learn more.
