Image Watermark Tool
Add text or logo watermarks to protect your images and maintain brand identity.
Introduction
In today's digital world, protecting your visual content is more important than ever. Whether you're a photographer sharing your portfolio online, a business owner showcasing products on social media, or a content creator building your brand, watermarking helps establish ownership and prevent unauthorized use of your images. A watermark acts as a visible signature on your photos, deterring theft while allowing you to confidently share your work across various platforms. This tool gives you complete control over how your watermark appears—from subtle corner signatures that don't distract from your content, to bold centered logos that clearly establish brand identity. You can add text watermarks with custom fonts and colors for copyright notices, website URLs, or photographer credits. Or upload your logo as a PNG or SVG file to create professional branded images. The real-time preview lets you experiment with different positions, sizes, and opacity levels until you find the perfect balance between protection and aesthetics. Everything processes directly in your browser using HTML5 Canvas technology, which means your original photos never leave your device and your privacy remains intact. Whether you're watermarking a single image or processing batches for an entire photo shoot, this tool makes the process fast, flexible, and completely secure.
Who Should Use This Tool?
- Photographers who need to protect portfolio images and client previews from unauthorized use
- E-commerce businesses adding brand logos to product photos before posting on marketplaces
- Social media content creators watermarking posts to build brand recognition and prevent theft
- Graphic designers adding copyright notices to work samples shared with potential clients
- Marketing agencies branding visual content for clients across multiple platforms
- Stock photography contributors watermarking preview images before sale
- Real estate agents protecting property photos with agency branding
- Artists and illustrators adding signatures to digital artwork shared online
- Bloggers watermarking featured images to maintain attribution when content is shared
- Event photographers providing watermarked previews before clients purchase full resolution images
How This Tool Works
This watermarking tool uses advanced browser-based image processing to add watermarks without compromising your privacy or image quality. When you upload an image, it's loaded directly into your browser using the HTML5 FileReader API—no server upload occurs. The tool then creates a canvas element matching your image dimensions and draws your photo onto it. For text watermarks, it uses the Canvas text rendering API with your chosen font size, color, and opacity settings. For logo watermarks, it loads your PNG or SVG file and composites it onto the image using the Canvas drawImage method with alpha blending. The position system calculates exact pixel coordinates based on your selection (corners or center), accounting for both the watermark size and appropriate padding from edges. Opacity is controlled through the Canvas globalAlpha property, allowing transparency from 10% (very subtle) to 100% (completely opaque). The real-time preview works by applying these settings to a temporary canvas that updates immediately as you adjust any parameter. When you're satisfied with the result, clicking download triggers the canvas toBlob method, which converts the watermarked image to PNG format without additional compression. This maintains maximum quality while preserving transparency where applicable. The downloaded file includes '_watermarked' in the filename for easy identification. Because all processing happens client-side using JavaScript and Canvas APIs, your images never touch external servers, ensuring complete privacy for sensitive client work or personal photos.
Try Image Watermark Tool Now
Use the interactive tool below to get instant results
Upload Image
Drag & drop or click to select
JPG, PNG, WEBP (Max 50MB)
No Image Selected
Upload an image to start adding watermarks
Watermarking Tips
Text Watermarks:
- Use high contrast colors (white on dark, dark on light)
- Adjust opacity for subtle branding (30-50%)
- Position in corners to avoid covering main content
Image Watermarks:
- Use PNG files with transparency for best results
- SVG logos work great for scalable watermarks
- Keep size between 10-20% for subtle branding
How to Use Image Watermark Tool
Upload Your Image
Drag and drop or click to upload. Handles JPEG, PNG, and WEBP files up to 50MB. The image loads right in your browser—no server upload, so your photos stay private on your device.
Pick Text or Logo
Choose text watermark and type your copyright notice, name, or website URL. Customize font size and color. Or choose image watermark and upload your logo (PNG or SVG). PNG with transparent backgrounds works best.
Adjust Settings
Use the opacity slider (10-100%)—lower values are subtle, higher values are bold. Pick position: top-left, top-right, center, bottom-left, or bottom-right. For logo watermarks, adjust the scale. The preview updates in real-time as you tweak settings.
Download Watermarked Image
Happy with the preview? Hit download to save your watermarked image. The filename gets "_watermarked" added so you can tell it apart from the original. Ready to post on social media, your website, or portfolio.
Use Cases for Image Watermark Tool
Protecting Portfolio Photos
Photographers add copyright text or signature watermarks to images they share online. Stops people from using your work without permission while still letting you show it off. Place watermarks in corners with 30-50% opacity so they are visible but do not ruin the photo.
Adding Logos to Product Photos
Businesses watermark product images with their logo before posting on social media or the website. When people share or repost your photos, the logo goes with it—free brand visibility. Use a PNG logo with transparent background in the corner at medium opacity.
Watermarking Social Media Content
Content creators add their username or logo to posts so people know who made it when images get shared around. Helps build recognition and drives traffic back to your account. Put it somewhere noticeable but not covering the main content.
Client Preview Images
Photographers and designers watermark preview images sent to clients before payment. Protects your work from being used without paying while still letting clients see what they are getting. Remove watermarks from final files after the client pays.
Protecting Tutorial Graphics
Course creators and educators watermark screenshots, diagrams, and illustrations to prevent unauthorized redistribution. Students can use the materials for learning, but watermarks discourage people from copying your course content and reselling it.
Key Features
Text or Logo
Add text watermarks or upload logo images.
PNG/SVG Logos
Upload PNG or SVG logos with transparency.
Font & Color
Customize text size and color for branding.
Opacity Slider
Adjust visibility from 10-100%.
Five Positions
Place watermarks in corners or center.
Logo Scaling
Scale logos from 5-50% of image size.
Live Preview
See changes in real-time before downloading.
Image Formats
JPG, PNG, and WEBP supported.
Up to 50MB
Handles large image files.
Instant Download
Download watermarked images immediately.
Browser Only
All processing happens locally.
No Upload
Images never leave your device.
Frequently Asked Questions
What types of watermarks can I add?
Two types: (1) Text watermarks—type copyright notices, your name, website URLs, or any message. Customize font size and color to match your brand. Good for simple attribution. (2) Logo watermarks—upload your logo, signature, or brand mark as PNG or SVG. PNG with transparent backgrounds looks most professional because the logo blends into the image without a visible rectangle around it.
How do I make watermarks visible but not annoying?
Most people use 30-50% opacity—visible enough to protect the image but subtle enough not to ruin it. Place watermarks in corners instead of the center so you do not cover important stuff. For text, pick a color that contrasts with the image—light text on dark images, dark text on light images. Avoid bright colors unless that is your brand.
What format should my logo be?
Use PNG with a transparent background—this is the most important part. If your logo has a white or colored background instead of transparency, it will show up as a rectangle on your image and look unprofessional. SVG works too and scales perfectly to any size. Make sure transparency is where you need it (not a solid background).
Will watermarking reduce image quality?
Nope. The watermarking process keeps your original quality intact. It uses HTML5 Canvas to layer the watermark on top without degrading the photo underneath. The output is saved as PNG to avoid compression issues. Your image dimensions, resolution, and detail stay the same—only the watermark is added.
Are my images uploaded anywhere?
Nope. Everything happens in your browser using JavaScript and HTML5 Canvas. Your images never leave your device, are never uploaded to any server, and are not stored anywhere. Your photos, logos, and watermarked results stay 100% private on your computer. You can even use this tool offline after the page loads.