WordPress does not currently allow you to upload WebP images directly to your Media Library, mainly because only 60%+ of Browsers support them, so if you were to only include WebP images on your website then about 30% of visitors would see no image at all. You will therefore need a plugin that can create these along side tote usual JPG, PNG & GIF images, along with serving both formats to your visitors. The post below might also help. WordPress Image Plugins - (Kraken Alternatives)

Thanks for the detailed information. Now I see why that happened. I used the Imagify plugin, but I found the image size doesn't get smaller even with the plugin. In a word, the plugin doesn't work.

I checked the settings in Imagify. It seems that I need to add some codes to the theme (as shown in the attached screenshot). That's a little complex for me. I'm afraid I didn't use it correctly.

You don’t need to add any code, you just need to tick the 2nd box at the top that says display images and leave the radio button as picture tag, then you’ll be good to go :-)

I ticked the box 'Display images in webp format on the site' and select the radio button 'Use rewrite rules" (see the attached screenshot). Is that correct?

No, that is not what I said, you need to use the picture tags, not the rewrite rules, that way you don’t have to add any code.

Got it. Thanks for your help. Really appreciate. :-)

Yeah, it's been a while that's for sure, this was a format done back in 2010, but it is becoming the preferred image format.

And I was just like you I would compress my images with Tiny PNG. But now that I am using WebP formatting my images are compressed even more and my site speed is even faster. And every little bit helps.

My site was loading at 1.5 seconds it now consistently load at around .7 seconds.

And as for another plugin - you would not be adding one - if you do decide to do this you would simply remove the Kraken plugin and replace it with the Imagify plugin.

And then in the setting change your current images to the WebP format. Imagify does that for you.

And then from that point on you don’t have to compress your images because Imagify does it for you and your images will be in the WebP format. You simply upload them and you’re good to go.

And the plugin itself has does not add any load to your site.

But again it's what you're comfortable with doing with your site and what you feel works for you.

Thanks, Leo, I'll give it a try, although it would mean another plugin. Kraken isn't installed on any of my sites through WA or manually.

I use Imagify to optimize my images - 1 click and it can update your images to WebP

And this plugin has no affect on you site speed when it comes to being used and installed

Is Imagify better than Kraken and if so do you recommend using Imagify and disconnecting the Kraken plugin?

Thanks Leo,

Encourager asks a good question. I am using Kraken as an optimizer, so do I need to use Imagify first and then leave kraken installed as the main site image optimizer. This seems like doubling up?

My apologies if that is a dumb question.

Alex

I went to install Imagify and it's not compatible with Kraken. You need to uninstall Kraken in order for Imagify to work.

Thanks for letting me know.

you need to uninstall Kraken first then install Imagify

I find Imagify to be far better

Thanks for getting back to me, Leo. Much appreciated.

No problem

Spot on, Chrystopher. I use the Imagify plugin to compress and convert images to WebP.

shortpixel!

Thank you the plugin Imagify compresses my images converts them to WebP

Funny thing about Google's page insights it actually does not measure site speed - it just gives you the things that are affecting your sites speed and the things you can do to rectify things.

For a more accurate measure of site speed it's best to use resources like Gmetrix

Save for web will still be using PNG or JPG, so yes, you’ll still want a plugin that can also create and serve the WebP format, as it’s a completely different file format that can save a further 60% on average.

Thank you so much, Chrystopher :)

To add to what Chrystofer said the best all in one plugin for image optimization and coverting images to WebP in my opinion is Imagify

I was thinking and researching other options such as Optimus but, I will take your word and go for Imagify,

Thank you so much, Leo!🤙🏽