OneTap WebP Converter scans your WordPress Media Library and converts every JPG/PNG attachment — including all registered thumbnail sizes — to the modern WebP format. Unlike plugins that keep both the original and a WebP copy, this plugin replaces the file in place, so your Media Library stays clean and your storage usage doesn’t grow.

Key Features

One-tap bulk conversion of all JPG/PNG images already in your Media Library
Converts every registered image size (thumbnail, medium, large, custom sizes), not just the full-size file
Uses Imagick or GD, whichever is available on your server
Adjustable WebP quality (1–100)
Optional backup of original files before conversion (.orig copies), with a one-click Restore option
Optional automatic rewriting of image URLs inside your post/page content
Batched AJAX processing with a live progress bar and log, so large libraries don’t time out
Live Media Library stats: total images, JPG/JPEG count, PNG count, and images already in WebP

Important — please read before use

This plugin modifies files on disk. If the backup option is disabled, original JPG/PNG files are permanently deleted after conversion. We strongly recommend:

Taking a full site backup before running a bulk conversion.
Keeping the “Backup originals” option enabled (it is enabled by default) so you can restore files if needed.
Testing on a staging site first if possible.

Server Requirements

Your server needs either the Imagick PHP extension (with WebP support) or the GD extension (with WebP support). If neither is available, the plugin will still activate and show a clear admin notice explaining the requirement.