Free Online Watermark Tool — Add Text Watermarks to Images
Easily add custom text watermarks to your images with our free online tool. Choose between Single Position mode for a discreet brand mark at any of 9 grid positions, or Full Coverage Tile mode that repeats your watermark diagonally across the entire image for maximum protection. Supports batch upload — watermark multiple images at once and download them individually or all as a ZIP archive. Customize font size, color, opacity, position, and rotation with real-time preview. All processing happens in your browser for complete privacy — your images and watermarks never leave your device.
Upload one or multiple images by dragging them onto the upload area or clicking to browse your files. Batch upload supported.
Type your watermark text and choose between Single Position or Full Coverage Tile mode. Customize font size, color, opacity, position, and rotation. Navigate between images using the carousel controls. The preview updates in real time.
Download your watermarked image individually, or click Download All to save every watermarked image as a single ZIP archive for efficient batch processing.
Tips for Adding Watermarks to Images
- For maximum copyright protection, use Full Coverage Tile mode — the diagonal -30° repeating pattern covers the entire image, making it nearly impossible to crop out the watermark.
- Keep watermark opacity between 30-60% for a professional look that protects your work without obscuring the image content. In Tile mode, lower opacity (20-40%) works best for a subtle but effective coverage.
- Processing multiple images? Upload them all at once — each image shares the same watermark settings. Use the carousel to preview each one, then download all as a single ZIP archive for efficient batch processing.
Frequently Asked Questions — Image Watermark Tool
Is the watermark tool really free?
Yes, completely free. No registration, no hidden charges, no watermarks on your output, and no file size limits. All processing happens locally in your browser — your images never leave your device.
How does the watermark tool work?
The tool renders your image on a canvas, then draws your chosen text on top with the specified style. In Single Position mode, one text watermark is placed at the chosen grid location (9 positions available). In Full Coverage Tile mode, the watermark is repeated diagonally across the entire image at -30° rotation, with staggered columns for a natural repeating pattern. The original image pixels are not modified; the watermark is an additional layer rendered at export.
What is the difference between Single and Tile watermark modes?
Single Position mode places one text watermark at a chosen location from a 9-position grid (Top-Left, Top-Center, Top-Right, Center-Left, Center, Center-Right, Bottom-Left, Bottom-Center, Bottom-Right). It supports adjustable rotation from -90° to 90°. Full Coverage Tile mode repeats your watermark across the entire image in a diagonal -30° grid pattern with staggered columns — this creates the classic stock-photo style watermark that covers the whole image, making it impossible to crop out. Tile mode is fixed at -30° rotation for optimal coverage.
What image formats are supported?
JPG, PNG, WebP, BMP, AVIF, GIF, TIFF, SVG, HEIC and more. The watermarked result is saved in your original upload format, preserving the original file type and compatibility.
Will the watermark reduce my image quality?
No. The watermark is rendered as a text layer on top of your image without any compression or resampling of the original pixels. The full resolution and quality of your image are preserved — only the text watermark is added. This applies to both Single and Tile modes, and to batch processing as well: every image is rendered at its original resolution with the watermark overlaid.
What is the best position or mode for a watermark?
The best choice depends on your goal. For branding, use Single Position mode with bottom-right corner placement and moderate opacity (40-60%) — visible but not distracting. For maximum copyright protection, use Full Coverage Tile mode — the diagonal repeating pattern covers the entire image, making it impossible to crop out. For social media thumbnails, a centered or bottom-center single watermark with moderate rotation works well. Tile mode at 20-30% opacity provides excellent protection without overwhelming the image.
How many images can I process at once? How about large images?
There is no hard limit on the number of images you can process at once — upload as many as you need. Each image can be up to 50 megapixels (50,000,000 pixels total). If an individual image exceeds this limit, you'll see a warning and can try a smaller version. Use the carousel navigation to preview each watermarked result, then download images individually or all at once as a ZIP archive for efficient batch processing.