Media WebP Converter

Description

Media WebP Converter helps optimize your WordPress site performance by converting media library images to the modern, lightweight WebP format.

Features:

  • Bulk convert existing media images to WebP format
  • Choose to overwrite original images or create new attachments
  • Set desired output image quality
  • Option to run conversions selectively
  • Simple UI integration in the WordPress dashboard

Improve loading speeds and reduce image sizes without compromising on visual quality.

Credits

Developed by Subrata Sarkar

Installation

  1. Upload the plugin files to the /wp-content/plugins/wp-image-to-webp-converter directory, or install the plugin through the WordPress plugin screen directly.
  2. Activate the plugin through the ‘Plugins’ screen in WordPress.
  3. Go to Media > Convert to WebP to configure and run conversions.

FAQ

Will this overwrite my original images?

Only if you choose the overwrite option. Otherwise, new WebP images are created as separate attachments.

Does it support all image sizes?

Yes, all registered image sizes (e.g., thumbnail, medium, large, custom sizes) are converted.

Can I undo the conversion?

If you chose to overwrite originals, the change is permanent. If new attachments were created, the original images remain intact.

Reviews

August 25, 2025
I tested it on a high resolution JPEG and it compressed ~2.5 MB down to 45 KB with minimal visible quality loss at a quality setting of 65. The interface is simple and automatic conversion on upload and page load works smoothly. One point to note is that it also reduced the image resolution so adding options to preserve dimensions and support AVIF format would make it even more versatile. Overall it is a genuinely helpful tool for image optimization and I appreciate the thought and effort put into making the process straightforward.
Read all 1 review

Contributors & Developers

“Media WebP Converter” is open source software. The following people have contributed to this plugin.

Contributors

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Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.

Changelog

1.0.0

  • Initial release