Batch Image Watermark
Add custom text watermarks to multiple images at once. Download all processed images as a ZIP archive.
Watermark Images
Click to select multiple images
Supports JPG, PNG, WebP. Select multiple files at once.How to Use
The Batch Image Watermark tool lets you add custom text watermarks to multiple images simultaneously and download all the processed images as a single ZIP archive. This is ideal for photographers who need to add copyright notices to their portfolio images, content creators who want to brand their visuals before sharing on social media, and businesses that need to add confidential or draft labels to internal documents.
Step 1: Configure your watermark settings. Enter the text you want to overlay on your images, choose the position (top-left, top-right, center, bottom-left, or bottom-right), set the font size in pixels, and pick the text color using the color picker. White text with a semi-transparent shadow effect is used by default for maximum readability against any background.
Step 2: Upload your images by clicking the upload area. You can select multiple files at once using Ctrl+Click (Windows) or Cmd+Click (Mac). The tool accepts JPG, PNG, and WebP formats. A preview of all uploaded files is shown with their filenames so you can confirm the selection before processing.
Step 3: Click "Apply Watermark & Download ZIP" to process all images. Each image is rendered onto a canvas where the watermark text is drawn at the configured position and size. The processed images are then packaged into a ZIP file using the JSZip library and automatically downloaded to your computer. The original files remain untouched — only the copies in the ZIP are watermarked.
All image processing happens entirely in your browser using the Canvas API. No images are uploaded to any server, ensuring your content remains private and secure. The tool handles images up to 4096x4096 pixels, and processing time depends on the number and resolution of the images you select.
Tips & Best Practices
Choose a readable position. The bottom-right corner is the most commonly used watermark position because it is less likely to obscure important image content. For portrait photography, consider the bottom-left corner instead, as the bottom-right often overlaps with the subject in portrait-oriented compositions.
Font size relative to image dimensions. A font size that works well on a 6000x4000 pixel photo will look enormous on a 1200x800 pixel image. Consider the typical resolution of your images when setting the font size. As a general guideline, 2-4% of the image width is a good starting point for watermark text size.
Color contrast is critical. Your watermark must be legible against the image background. White text works well on dark or busy backgrounds, while dark text is better for light, minimal images. If your images have varying backgrounds (some dark, some light), consider adding a semi-transparent background box behind the text for consistent readability.
Keep watermarks subtle. An overly prominent watermark can detract from the visual impact of your images. For photography portfolios and social media content, a semi-transparent watermark that is visible but not distracting strikes the right balance between protection and aesthetics. Increase opacity only when the primary goal is deterrent against unauthorized use.
Batch processing saves time. Instead of watermarking images one by one in photo editing software, upload all your files at once and process them in a single batch. This is particularly useful when preparing large sets of images for client proofing, social media scheduling, or e-commerce product listings.
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