Convert Your Images to WebP for Free

Indirectly, yes. WebP files are around 25-35% smaller than JPEG, so pages load faster and score better on Core Web Vitals - and it clears PageSpeed's "serve images in next-gen formats" audit.

No. After each conversion ThumbPress rewrites the stored URLs across your post content, meta and options - including WooCommerce - so every reference points at the new file.

WebP is supported by all modern browsers, including current versions of Chrome, Firefox, Edge and Safari.

Yes. WebP conversion in ThumbPress is completely free and unlimited, with no image caps and no cloud credits - it all runs on your own server.

No. Background conversion processes your library in batches through an Action Scheduler queue that keeps running after you close the tab, so libraries with tens of thousands of images finish without hitting a PHP execution limit.

Yes. Cancel at any point and the queue stops cleanly. Images already converted stay converted, and you can start a fresh run later to finish the rest.

The WebP version is written first and verified, and only then is the old file removed. If a conversion fails for any reason, the original is left exactly where it was.

Yes. Conversion works on the attachment as a whole - the full-size file is converted and the registered sizes are rebuilt from it, so you never end up with a WebP original and JPEG thumbnails.

ThumbPress raises the image memory limit and pre-flights each file against the memory actually available before it starts. Images that would not fit are skipped rather than crashing the run.