ChrisHurst

MyWebsiteAdvisor

This plugin allows you to Automatically add a watermark to all images as they are viewed on your WordPress Website. 
Watermarks are not permenant, original images are not edited. 
The plugin maintains a cached copy of the watermarked image, which can be cleared and regenerated at any time!
The plugin uses PNG watermark images with transparency for precise control over the appearance of the watermarks. 
This plugin also supports simple text watermarks with adjustable color, size and transparency. 
The user friendly settings page allows for control over the appearance of your watermark. 
The watermark preview feature allows for easy testing of the plugin settings. 
The watermark size is controlled as a percentage of the target image, 50% means the watermark will be half the width of the target image.
This plugin needs to add to your .htaccess file, and will not work if you do not have a .htaccess file or mod_rewrite.
NOTE: 
This plugin may have a slight impact on the performance of your web server, use of the Included Basic Caching System is Highly Recommended! 
The premium version of this plugin also includes an Advanced Cache System which performs nearly identical to when the plugin is disabled.
<a href="http://MyWebsiteAdvisor.com/tools/wordpress-plugins/simple-watermark/" rel="nofollow ugc">Upgrade to Simple Watermark Ultra</a> for advanced 
watermark features including:
<ul>
<li>Improved Performance with Advanced Cache</li>
<li>Fully Adjustable Image Watermark Position</li>
<li>Fully Adjustable Text Watermark Position</li>
<li>Adjustable JPEG Image Output Quality</li>
<li>Highest Quality Watermarks using Image Re-sampling rather than Re-sizing</li>
<li>Lifetime Priority Support and Update License</li>
</ul>
Developer Website: http://MyWebsiteAdvisor.com/
Plugin Support: http://MyWebsiteAdvisor.com/support/
Plugin Page: http://MyWebsiteAdvisor.com/tools/wordpress-plugins/simple-watermark/
Requirements:
<ul>
<li>PHP v5.0+</li>
<li>WordPress v3.3+</li>
<li>GD extension for PHP</li>
<li>FreeType extension for PHP</li>
<li>.htaccess file and mod_rewrite</li>
</ul>
To-do:

Simple Watermark

Automatically watermark images as they are viewed

dFactory

Enhance your WordPress site’s image security and branding. Image Watermark allows you to apply image or text overlays to new uploads and bulk process existing Media Library images with ease.
<h4>Key Features:</h4>
<ul>
<li>Watermark Types: Choose from image-based or text-based watermarks with full customization.</li>
<li>Flexible Application: Automatic watermarking on uploads, manual/bulk apply/remove via Media Library.</li>
<li>Advanced Customization: Position watermarks precisely, adjust sizes, opacity, and more.</li>
<li>Backup & Restore: Secure backups for easy watermark removal.</li>
<li>Image Protection: Prevent copying via right-click, drag-and-drop, and developer tools.</li>
<li>Technical Excellence: Supports JPEG, PNG, WebP; ImageMagick/GD engines; preserves metadata.</li>
</ul>
Perfect for photographers, bloggers, and businesses looking to safeguard their visual content.
For more information, check out the <a href="http://www.dfactory.co/products/image-watermark/" rel="nofollow ugc">plugin page</a>, <a href="http://www.dfactory.co/docs/image-watermark/" rel="nofollow ugc">documentation</a>, or <a href="http://www.dfactory.co/support/forum/image-watermark/" rel="nofollow ugc">support forum</a>.
<h4>Feature Breakdown:</h4>
Watermarking Types: 
* Support for image-based watermarks (upload custom images as watermarks) 
* Support for text-based watermarks (customizable fonts, colors, and sizes) 
* Automatic watermarking on new uploads to the Media Library 
* Manual and bulk watermarking for existing images (apply or remove via Media Library actions)
Customization & Settings: 
* Flexible watermark positioning (9 alignment options with pixel or percentage-based offsets) 
* Three watermark size modes: original, custom dimensions, or scaled to image size 
* Adjustable watermark transparency and opacity 
* Watermark image preview for real-time adjustments 
* Selective application: Choose specific post types or enable everywhere (including frontend uploads) 
* Image format selection (baseline or progressive JPEG) 
* Configurable image quality settings
Backup & Management: 
* Automatic image backup functionality (stores originals for easy restoration) 
* Option to remove watermarks (restores from backups when available) 
* Secure backup storage with .htaccess protection
Image Protection: 
* Disable right-click context menus on images 
* Prevent image copying via drag-and-drop 
* Block access to developer tools for image inspection 
* Customizable protection notice/toast message displayed to users attempting to copy images
Technical Information: 
* Support for JPEG, PNG, and WebP image formats 
* Dual image processing engines: ImageMagick (preferred) with GD library fallback 
* EXIF and IPTC metadata preservation (where supported) 
* Cache-busting for immediate thumbnail updates after watermark changes 
* Translation-ready with included .pot file

Image Watermark

Secure and brand your images with automatic watermarks. Apply image or text overlays to new uploads and bulk process existing Media Library images wit …

Simple Watermark vs Image Watermark