Support » Plugin: Flying Images by WP Speed Matters » About WebP conversion (via CDN)

  • Resolved Christian Meier


    Just to know… At this moment, just Firefox browser supports it?
    I’ve just tried on Chrome, Edge -last versions- … And all my images still .png. It works perfectly on Firefox only.
    Or I’m doing something wrong?

Viewing 5 replies - 1 through 5 (of 5 total)
  • Plugin Author Gijo Varghese



    Having “.png” extension doesn’t mean files are PNG. A web server can deliver any file. You’ve to check the response header and look for “content-type: image/webp”.

    Also in any case, if webp conversion increased size or there isn’t a noticeable difference, the original file will be delivered.

    You can check if Firefox support webp here:

    I checked and realized thaat in one of the sites we activate your plugin, almost all of the images are served through Statically, but only one, which is PNG, is still serving through Cloudflare with content type PNG.
    We have Cloudflare for this site before activating your plugin. After activating it, almost all of the images were serving through Statically… so if almost all of them were right, why just a PNG still loading from Cloudflare as PNG instead of WEBP?

    Plugin Author Gijo Varghese


    @djwilko12 the PNG might be inside some CSS or JS file. Check origin. Check if the PNG file in referenced in HTML.

    Hi! if its referenced on HTML it cannot be webp?

    Plugin Author Gijo Varghese


    @djwilko12 I mean, the image should found in the HTML, then only Flying Images can find it and rewrite it to Statically CDN.

Viewing 5 replies - 1 through 5 (of 5 total)
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