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<a href="http://visualwatermark.com/wp-photo-protect/" rel="nofollow ugc">Photo Protect</a> adds an invisible layer over your post images to protect them from copying. 
Visitors trying to save an image will get a blank image instead of your photo.
Here is why you should download it:
<ul>
<li>Protects your images. 9 out of 10 visitors won’t be able to download and copy your images.</li>
<li>Works in every modern browser. No plugins required!</li>
<li>Has no dependencies. Correctly works with every framework your theme may have jQuery, MooTools, ExtJS, GWT, etc.</li>
<li>Supports responsive themes. Applies protection in a way both theme and protection layer continue to function properly. Even if your visitor resizes her browser.</li>
<li>Works on smartphones.</li>
</ul>

Photo Protect

Adds an invisible layer over your images to protect them from copying.

MantraBrain

Ultimate Watermark is the most comprehensive WordPress image watermarking plugin available. This professional-grade solution automatically adds watermarks to images as they are uploaded to your WordPress media library, protecting your valuable content from unauthorized use.
🔒 Protect Your Images with Professional Watermarking
Built with both GD and ImageMagick support, Ultimate Watermark offers enterprise-level watermarking capabilities with extensive customization options. Whether you’re a photographer protecting your portfolio, an e-commerce store branding product images, or a content creator safeguarding your work, this plugin provides the tools you need.
🎯 Perfect for: 
* Professional photographers and studios 
* E-commerce websites and online stores 
* Content creators and bloggers 
* Corporate websites and portfolios 
* Digital artists and designers 
* Media companies and publishers
<h4>🎯 Key Features & Benefits</h4>
🖼️ Advanced Image Watermarking System 
* Automatic Watermark Application – Watermarks are applied instantly when images are uploaded 
* Bulk Watermark Operations – Process existing images in your media library with bulk actions 
* Frontend Watermarking – Support for user-uploaded images on the frontend 
* Multi-Size Targeting – Watermark specific image sizes (thumbnail, medium, large, custom) 
* Custom Post Type Support – Apply watermarks only to specific post types
⚙️ Professional Configuration Options 
* Watermark Image Management – Upload and manage multiple watermark images 
* Flexible Size Control – Choose from Original size, Custom dimensions, or Scaled percentage (1-100%) 
* Transparency Control – Adjust opacity from 0% (invisible) to 100% (fully visible) 
* Quality Optimization – Configure output image quality (1-100%) for optimal file sizes 
* Format Selection – Choose between Baseline or Progressive JPEG for better compatibility
📍 Precise Watermark Positioning 
* 9-Position Grid System – Top/Middle/Bottom × Left/Center/Right alignment options 
* Advanced Offset Controls – X and Y positioning with pixel or percentage units 
* Professional Results – Pixel-perfect positioning for brand consistency
🛡️ Comprehensive Image Protection 
* Right-Click Disable – Prevent image downloading through right-click 
* Drag & Drop Prevention – Stop users from dragging images to their desktop 
* User-Level Protection – Optional protection settings for logged-in users 
* Enhanced Security – Multiple layers of image protection
💾 Smart Backup & Recovery System 
* Automatic Backup Creation – Original images are safely backed up before watermarking 
* Configurable Backup Quality – Set backup image quality to balance file size and preservation 
* Safe Watermark Removal – Restore original images by removing watermarks 
* Data Integrity – Maintain image quality and metadata throughout the process
🔧 Technical Excellence & Performance 
* Dual Library Support – Works with both GD and ImageMagick for maximum compatibility 
* Metadata Preservation – Maintains EXIF and IPTC data for professional workflows 
* Memory Optimization – Efficient processing for large image libraries 
* WordPress 6.4 Ready – Fully compatible with the latest WordPress version 
* GPLv3 License – Open source with WordPress compatibility
<h4>🚀 Quick Setup</h4>
<ol>
<li>Install & Activate the plugin</li>
<li>Upload Watermark Image in Watermark Image settings</li>
<li>Enable Automatic Watermarking in General Settings</li>
<li>Select Target Image Sizes (avoid full size unless necessary)</li>
<li>Configure Position & Settings as needed</li>
</ol>
<h4>📋 Detailed Features</h4>
General Settings 
* Toggle automatic watermarking for new uploads 
* Enable manual watermarking for media library 
* Select specific image sizes for watermarking 
* Target custom post types 
* Enable frontend watermarking
Watermark Image Settings 
* Upload and manage watermark images 
* Size control: Original, Custom (X/Y pixels), or Scaled (1-100%) 
* Transparency adjustment (0-100%) 
* Output quality control (1-100%) 
* Image format selection (Baseline/Progressive)
Position Settings 
* 9-position alignment grid 
* X and Y offset values 
* Offset units (pixels or percentages) 
* Precise positioning control
Protection & Backup 
* Right-click disable option 
* Drag and drop prevention 
* Logged-in user protection toggle 
* Automatic backup creation 
* Backup quality settings
<h4>🎨 Use Cases</h4>
<ul>
<li>Photography Websites: Protect professional images</li>
<li>E-commerce: Brand product images</li>
<li>Portfolio Sites: Add copyright protection</li>
<li>Blogs: Prevent image theft</li>
<li>Corporate Sites: Maintain brand consistency</li>
</ul>
<h4>🔧 Technical Requirements</h4>
<ul>
<li>WordPress 5.0 or higher</li>
<li>PHP GD extension OR ImageMagick</li>
<li>Sufficient server memory for image processing</li>
<li>Write permissions for upload directory</li>
</ul>

Ultimate Watermark – Advanced Image Watermarking

Automatically add professional watermarks to your images with advanced positioning, protection features, and backup capabilities.

Photo Protect vs Ultimate Watermark – Advanced Image Watermarking