Title: WebP Conversion don’t work
Last modified: February 21, 2024

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# WebP Conversion don’t work

 *  Resolved [etyper](https://wordpress.org/support/users/etyper/)
 * (@etyper)
 * [2 years, 3 months ago](https://wordpress.org/support/topic/webp-conversion-dont-work/)
 * I decided to try the conversion to webp and got the following: “WebP rules verified,
   but self-test failed: WebP response failed mime-type test. Purge all caches and
   try again”.
 * But the my site doesn’t use any caching plugin and the hosting says they don’t
   have caching either.
 * Also tried enabling “JS WebP Rewriting” but nothing changed. Files with the .
   webp extension are created, but still jpg in the browser.
 * How can I find out what is preventing it from working?

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Support [adamewww](https://wordpress.org/support/users/adamewww/)
 * (@adamewww)
 * [2 years, 3 months ago](https://wordpress.org/support/topic/webp-conversion-dont-work/#post-17446999)
 * Is it an Apache server? The rules only work on those. Can you share the system
   info from the support tab of the plugin settings? If you would rather, you can
   contact us directly and send them there: [https://ewww.io/contact-us/](https://ewww.io/contact-us/)
 *  Thread Starter [etyper](https://wordpress.org/support/users/etyper/)
 * (@etyper)
 * [2 years, 3 months ago](https://wordpress.org/support/topic/webp-conversion-dont-work/#post-17447133)
 * Yes, this is an Apache server. I submitted “system info from the support tab”
   through the form on the support page.
 *  Plugin Support [adamewww](https://wordpress.org/support/users/adamewww/)
 * (@adamewww)
 * [2 years, 3 months ago](https://wordpress.org/support/topic/webp-conversion-dont-work/#post-17464301)
 * I’m going to resolve this thread as you managed to find and fix what was causing
   the issue. If you have further questions, please let us know!
 *  Thread Starter [etyper](https://wordpress.org/support/users/etyper/)
 * (@etyper)
 * [2 years, 3 months ago](https://wordpress.org/support/topic/webp-conversion-dont-work/#post-17465350)
 * As I already informed you on the support page:  I talked to the hosting and it
   turned out that the server has the setting “Serving static content by nginx”.
   After disabling this option, everything worked”.
 * The name of this option is not very intuitive to associate it with caching.
 * Thanks for the nice plugin. And sorry for the inconvenience.

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘WebP Conversion don’t work’ is closed to new replies.

 * ![](https://ps.w.org/ewww-image-optimizer/assets/icon-256x256.png?rev=1582276)
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## Tags

 * [webp](https://wordpress.org/support/topic-tag/webp/)

 * 4 replies
 * 2 participants
 * Last reply from: [etyper](https://wordpress.org/support/users/etyper/)
 * Last activity: [2 years, 3 months ago](https://wordpress.org/support/topic/webp-conversion-dont-work/#post-17465350)
 * Status: resolved