Thenaynhe Watermark

Thenaynhe Watermark stamps a watermark image (such as your logo) onto JPEG and PNG images at the moment they are uploaded to the WordPress Media Library. There is nothing to do per image: configure it once and every new upload is watermarked automatically.

The plugin uses the PHP GD library that ships with most hosting environments, and it preserves the transparency of a PNG watermark while still letting you set a global opacity.

Features

• Add an image (logo) watermark to JPEG and PNG uploads
• Nine placement positions (corners, edges and center)
• Adjustable watermark size, expressed as a percentage of the main image width
• Adjustable opacity from 0% to 100%
• Configurable edge margin
• Skip images below a minimum width so small thumbnails are left untouched
• Transparent PNG watermarks are kept transparent
• Simple settings screen with a Media Library picker

Good to know

• The watermark is written onto the uploaded file, so it cannot be removed later. Test with a sample upload first.
• Only the original uploaded file is processed. The intermediate thumbnail sizes that WordPress generates are not watermarked.
• This version supports JPEG and PNG uploads. Text-only watermarks and WebP input are not supported yet.