Watermark Generator
Add custom text watermarks to uploaded photos with font, opacity, and positioning controls.
About Watermark Generator
The Client-Side Image Watermark Generator stamps custom text watermarks, logo PNG overlays, tiled copyright patterns, and brand signatures onto images with customizable opacity, rotation, font styling, and 100% in-browser Canvas rendering.
How to Use Watermark Generator
Step 1
Upload your image into the workspace.
Step 2
Type your watermark text or upload a transparent logo PNG.
Step 3
Adjust position, opacity, font size, and rotation angle.
Step 4
Click "Download Watermarked Image".
Practical Use Cases for Watermark Generator
Photography & Portfolio Copyright Protection
Protect creative photography, stock images, and client proofing galleries from unauthorized image scraping and reposting.
Social Media & E-Commerce Branding
Batch stamp transparent logo watermarks and brand handles onto Instagram product photos and marketing graphics.
Input & Output Examples
Stamping Diagonal Text Watermark
Text: "© 2026 RenderXD - All Rights Reserved", Opacity: 35%, Angle: -45°
Full-resolution image with crisp, semi-transparent diagonal copyright watermark overlay
Key Features & Performance
- ✓Supports Custom Text Watermarks and PNG Logo Image overlays.
- ✓Flexible positioning: 9-point grid alignment (Top-Left to Bottom-Right) or Full Tiled Pattern.
- ✓Adjustable Opacity slider (0% to 100%), Rotation angle, Font size, and Color.
- ✓100% Client-Side HTML5 Canvas processing ensures full image privacy.
- ✓1-Click Download watermarked image at original resolution.
Key Terminology & Definitions
Digital Watermarking
The process of embedding a visible or invisible identifier (text, logo, metadata) into digital media to assert intellectual property ownership.
Alpha Blending
The computer graphics technique of combining a translucent foreground image with a background image using transparency alpha channels.