Convert WordPress Images to WebP

The Problem

Your images are in standard JPG/PNG format, taking up more bandwidth and load time than necessary, when the modern WebP format would show the same images at a noticeably smaller file size with virtually identical quality.

About this problem

WebP is a modern image format supported by every major browser today, typically producing 25-35% smaller files than an equivalent-quality JPG or PNG. The catch is that converting an entire existing WordPress media library, and serving WebP with a correct fallback for the rare older browser or tool that doesn't support it, needs doing properly so you don't end up with broken images for anyone.

This is worth doing alongside general image compression, but is a distinct step — compression shrinks a file within its existing format, while WebP changes the format itself for further savings.

What's Included

• Converting your existing media library images to WebP
• Setting up automatic WebP conversion for future uploads
• Configuring correct fallback delivery for any browser or tool that doesn't support WebP
• Confirming images display correctly across different browsers after conversion

What's NOT Included

• General image compression within existing formats (see the dedicated image optimisation service, often paired with this)
• Converting images embedded in PDFs or other non-WordPress-managed files
• Fixing display issues in third-party tools that fundamentally don't support WebP (fallback handles browsers; some niche tools may still need the original)

How It Works

1. Audit the existing media library and identify which images are good candidates for WebP conversion.
2. Convert existing images to WebP while retaining the originals as a fallback source.
3. Configure the server or a plugin to serve WebP to browsers that support it and the original format to those that don't.
4. Set up automatic WebP generation for all future uploads.
5. Test across a few different browsers to confirm correct delivery and that nothing displays broken.

In practice: you buy the service, send over whatever access or details the job needs, I investigate and do the work, and you confirm it's resolved before we call it done.

Frequently Asked Questions

Is WebP actually better than JPG or PNG?

For web use, generally yes — WebP produces smaller files at comparable visual quality, which means faster page loads with no real downside for a modern website.

Will converting to WebP break my images in older browsers?

No, proper fallback delivery is set up so any browser or tool that doesn't support WebP automatically receives the original JPG/PNG instead.

Do I need to re-upload my images to convert them to WebP?

No, existing images in your media library are converted in place, with the originals kept as the fallback source.

Is WebP conversion the same as image compression?

No, they're complementary — compression reduces file size within the current format, WebP conversion changes the format entirely for additional savings, and both together give the biggest improvement.

Will WebP images look different from my original JPGs?

At a sensible quality setting, the difference is generally imperceptible to visitors, while the file size reduction is very real and measurable.