Marko Vasiljevic

Hello Steve,

Thank you for reaching out and I am happy to help!
The W3 Total Cache optimizes all images with the webp conversion. Meaning, that all available images that you have on your website can be converted by the W3TC to serve as webp, including jpg and png.
One of the aspects of image optimization is also lazyloading ability.

Can you please clarify what type of image optimization you are looking for?

As for the DB optimization, W3 Total Cache does not optimize DB, however, W3 Total Cache offers the ability to cache the DB requests, and Onjects using DB Caching and Object Caching. The best would be to use memory-based caching like Redis or Memcached for those features.

I hope this answers your question and please let me know if you have any other questions.

Thanks!

Hello Claudio,

Thank you for reaching out and I am happy to help!
I am unfamiliar with the Klaviyo integration so I cannot give specific instructions for the W3 Total Cache setup in this case, especially because of the lack of documentation related to the interaction with the caching plugins.
Can you please specify if this integration is on any specific page and please share the website URL and the URL of the page you are referring to so I can check and inspect the source
Thanks!

Hello Andres,

Thank you for reaching out and I am happy to help!
I’ve replied to your email on 01/07/2025 and I’ve re-sent the information to the email you provided.
Please check the email again from the W3 Total Cache support channel, and let me know if you received it
Thanks!

Hello,

Thank you for reaching out and I am happy to help!
The W3 Total Cache CDN serves static files from the CDN, meaning the JS, CSS, and images files are uploaded and served from the CDN, and the HTML files are still served from the origin.
Therefore, if you wish your entire website to be served from the CDN, you need to enable and use Full site delivery (FSD CDN). Full Site Delivery: Serve your entire site from a Content Delivery Network (CDN), ensuring faster load times worldwide.

I would recommend using Bunny CDN for the FSD integration or a regular CDN

Thanks!

Hello,

Thank you for reaching out and I am happy to help!
The W3 Total Cache Pro offers additional options that can be used to further improve the performance of your website. Depending on how the website is developed, what plugins are used, and what metrics you are using to check the website performance, you can use the PRO options to configure the plugin accordingly.
No plugin can auto-improve the website performance by just enabling it, as all websites are different and it could lead to breaking scripts and CSS if something like that would be attempted.
So to answer your question, W3 Total Cache Pro unlocks additional options for optimization.
You can always get our Premium support in Performance>Support and for a field fee we can perform Plugin Configuration, Performance Audit, or any other Premium support you need.
I hope this helps!
Thanks!

Hello Carlos,

Thank you for reaching out and I am happy to help!
Can you please drop us a note directly via the W3 Total Cache support channel in Performance>Support>Billing, and share the information about your purchase please?
This is a public forum so it’s not advisable to share any sensitive information
Thanks!

Hello Simone,

Thank you for reaching out and I am happy to help!
In W3 Total Cache All images converted with the Image Service tool are sent to a third-party server maintained by the W3 Total Cache team which reduces resource consumption and allows for a large number of conversions in environments where resources can be limited such as shared hosting. Images sent to the W3TC server for conversion are only held temporarily and no permanent information is kept on the server regarding the images.

WebP optimizations with the Image Service tool do not replace the original image file and all conversions can be reverted without any loss of data.

There is a possibility that something is blocking the API request from the server. When the conversion is active, please inspect the sources and check if you have any 404 requests.

Please also check if you have any security plugins that may be blocking the requests, or any other image optimization plugins.

Thanks!

Hello Daniel,

Thank you for reaching out and I am happy to help!
This is a public forum, so please send a request via the W3 Total Cache plugin in Performance>Support>Billing, provide the information about your subscription and the details you need in the invoice so we can avoid sharing the sensitive information here.
Thanks!

Hello Armando,

Thank you for reaching out and I am happy to help!
W3 Total Cache does not provide the CDN services. In the W3 Total Cache you have the option to connect your website to the CDN with the CDN provider of your choice (we recommend BunnyCDN).
This being said, you need to signup with the CDN provider and connect it to the W3 Total Cache in order to serve the from the CDN

I hope this answers your question.

If you have any other questions or need any clarifications please feel free to ask

Thanks!

Hello Francois,

Thank you for your feedback.
This can be defined in the template of your theme. No, the W3 Total Cache does not add this, so this is added by some other plugin or theme.
Also, make sure to check the wp-config.php

Thanks!

Hello Roman,

Thank you for reaching out and I am happy to help!
I’ve checked your website, however, without knowing the things you optimized and which settings you used to configure the W3 Total Cache I am not able to specify with certainty what exactly is the problem.
The Google Page speed tests are not 100% reliable. Mostly because of how they measure the performance and how they change the testing each time depending on the location. One thing that I can see made a lot of difference is the LCP which is related to the cookie consent banner which changed and impacted the score. This, however, may be related to how late the script was running prior to the load.

Have you performed more than one test or was this result the only one you got?

Thanks!

Hello Jakub,

Thank you for reaching out and I am happy to help!
The only way to separate the cache is to make sure that this page has a cookie you can use to create a separate cache based on that cookie.
In the W3 Total Cache, you can use the Cache Groups, and create a group of Cookies by specifying names in the Cookies field. Assign a set of Cookies to ensure that a unique cache is created for each Cookie group.

I hope this helps!

Hello Matt,

Thank you for reaching out and I’m happy to help!
At the moment the only solution is to save to configuration in the database instead of the file.
We are working and improving the W3 Total Cache continuously and thank you for taking the time to suggest this.
I will bring this up with the dev team so we can make sure this is not a problem in the future.

Thanks!

Hello Paolo,

We have received your email and provided the requested information
Thank you for your patience

Hey Alessio,

I’ve re-sent it again
Thanks!

Hello Darrell,

Thank you for reaching out and I am sorry about the late response
Those filters you are referring to, are they adding a query string to the URL once the filter is applied?
If this is the case, Can you please also share the caching method you are using in the W3 Total Cache for Page Caching?
If the default is Disk: Enhanced, this does not cache pages with query strings so can you please confirm which caching method you are using?
Thanks!

Hello Alan,

Thank you for your question about certifications and for using W3 Total Cache. I’d be happy to clarify what ISO 27001, SOC 2, and SOC 3 certifications mean and how they relate to your website’s performance and security.
What Are These Certifications?

ISO 27001
This is an international standard for managing information security. Organizations with ISO 27001 certification demonstrate that they have implemented strict controls to protect sensitive data from risks such as breaches, data loss, or unauthorized access.
Where It Applies: Hosting providers, data centers, and managed service providers often achieve this certification to reassure their customers that they have robust security measures in place.

SOC 2
SOC (Service Organization Control) 2 is an audit framework specific to service providers managing customer data. It ensures compliance with five trust service criteria: security, availability, processing integrity, confidentiality, and privacy.
Where It Applies: SaaS platforms, cloud hosting services, and companies that handle customer data extensively.

SOC 3
SOC 3 is similar to SOC 2 but is less detailed and more geared towards general public reporting. It provides a summary of the organization’s compliance without the technical specifics found in SOC 2.
Where It Applies: Public-facing companies use SOC 3 to give a general assurance of their security and compliance practices.

How These Relate to W3 Total Cache
W3 Total Cache is a WordPress plugin that enhances website performance by optimizing caching and improving page load speeds. As a plugin, W3 Total Cache operates within your WordPress environment and doesn’t independently store or process sensitive data that would typically require these certifications.

Your site’s security and compliance depend primarily on:
Your Hosting Provider: Many hosting providers (e.g., AWS, Google Cloud, or Microsoft Azure) are ISO 27001 and SOC-certified. Using W3 Total Cache on these platforms ensures that your caching and optimization efforts are built on a secure foundation.
Your Site Configuration: Regularly updating your plugins, using HTTPS, and following best practices for website security.

What Can You Do Next?
If certifications like ISO 27001 or SOC 2/3 are critical for your organization, I recommend verifying the certifications of your hosting provider or any managed service you use. They are typically responsible for the infrastructure-level compliance that ensures your site meets these requirements.
Please let us know if you’d like more information or have further questions. We’re here to support you!

I hope this helps!

Thanks!

• This reply was modified 11 months ago by Marko Vasiljevic.

Hello Sandra,

Thank you for reaching out and I am happy to help!
Can you please share some information on why you decided to remove the W3 Total cache plugin?
And to answer your question:
1. Check .htaccess File (make backup)
W3TC will create many directives in .htaccess file to control the caching behavior. Each section will start and end with comments like “#BEGIN W3TC Page Cache core” and “#END W3TC Page Cache core”.
Ensure that no residual entries are left over in your .htaccess file after deleting the plugin.
2. Delete wp-content files and folders
– cache folder
– w3tc-config folder
– object-cache.php (if exists)
– advanced-cache.php (if exists)
– db.php (if exists)
– upgrade folder
– delete w3-total-cache folder in wp-content/plugins/ (if exists)
3. Delete Cached Files from CDN (if using CDN)
Besides deleting all the relevant files, if you use CDN then ensure to purge the cached content from your CDN. This is necessary when you enabled minify option in W3TC settings. You should delete the minified and combined scripts and CSS files from your CDN server to avoid the site breaking on the browser.
4. Go to your wp dashboard and re-install W3 Total Cache

Let me know if this helps!
Thanks!

Hello Marc,

Thank you for reaching out and I am happy to help!
I’ve reset the active URL for the W3 Total Cache Pro license.
Remove the license key from Performance>General settings, Licensing sub-box, license field and save all settings. Re-enter the license, verify the license with the “verify license button” and save all settings.

W3 Total Cache Pro should be active after these steps!

Thanks!

Hello,

Thank you for reaching out and I am happy to help!
This is not a problem. When the W3 Total Cache Pro license is added to Performance>General settings, Licensing sub-box, license field, the license should be verified and all settings saved.
The license will be saved and applied to your subdomain
When you want to switch the license key to another domain, remove the license key from subdomain installation Performance>General settings, Licensing sub-box, license field and save all settings. This will clear the license and you can then add it to the main domain and enter the license key in Performance>General settings, Licensing sub-box, license field, verify the license with the “verify license button” and save all settings.

W3 Total Cache Pro should be active after these steps!

Thanks!