Petro SEO Images to WebP

Petro SEO Images to WebP converts your existing JPEG and PNG attachments to WebP in bulk, then serves them on the front-end through the standard <picture> element with a full responsive srcset. The original files stay untouched on disk, so reverting is as simple as flipping a switch.

Designed to be small, dependency-free and predictable. No external services, no images uploaded anywhere, no opaque queue.

What it does

• Converts every registered image size (full + thumbnails) to .webp next to the original (e.g. photo.jpg → photo.jpg.webp).
• Wraps <img> tags from wp_get_attachment_image() and the_content in <picture><source type="image/webp">…</picture>, preserving full srcset and sizes.
• Skips images automatically if a previous run failed because of filesystem permissions, so you can retry on demand without reprocessing the whole library.
• Ramps the WebP quality down (75 → 60 → 45 → 40) when the encoded file ends up larger than the original, so you never ship a “WebP” that is heavier than the JPEG.
• Idempotent: re-running the bulk job only touches new or updated images.

What it does NOT do

• It does not delete or modify your original JPG/PNG files.
• It does not require Imagick or a specific image library beyond what WordPress already uses (wp_get_image_editor()).
• It does not phone home, register endpoints, or load remote scripts.

Privacy

The plugin processes images locally using WordPress’s built-in image editor. No data is sent to third-party services.