Why this matters
Watermarking is the most practical way to protect visual content from unauthorized reuse while still sharing it publicly. Whether you are a photographer distributing preview images, a designer sharing mockups with clients, or a stock contributor providing sample files, the watermark serves as both a deterrent and a branding tool. The key distinction is that this tool bakes the watermark into the pixel data at export time, making it permanent for anyone who receives the file. Unlike overlay-based watermarking that can be stripped by inspecting the page source, a pixel-baked watermark survives any format conversion or re-upload.
The tile mode is what elevates this beyond a simple stamp tool. A single centered watermark is easy to crop out, but a diagonal tile pattern covering the entire image makes removal impractical without destroying the underlying image. This is the approach used by stock photography agencies for their preview samples. The tool supports both text watermarks (typed inline) and image watermarks (transparent PNG logos), giving you the flexibility to brand with either your name or your company mark.
Watermark placement options
| Placement | Description | Best For |
|---|---|---|
| Top-Left | Corner anchor | Minimal branding |
| Top-Center | Centered top edge | Landscape photos |
| Top-Right | Corner anchor | Standard photographer credit |
| Center | Dead center | Prominent branding |
| Tile (Text) | Diagonal repeat at -30 degrees | Stock-sample proofing |
| Tile (Image) | Grid-aligned repeat | Logo pattern overlays |
| Bottom-Left | Corner anchor | Subtle credit |
| Bottom-Center | Centered bottom edge | Document-style stamps |
| Bottom-Right | Corner anchor | Most common placement |
How to use it
Drop or upload your base image onto the drop zone — the image loads entirely within the page.
Switch to text watermark mode and type your watermark text, or switch to image watermark mode and drop a transparent PNG logo.
Adjust the opacity slider to control how visible or subtle the watermark appears over the image.
Adjust the size slider to scale the watermark relative to the base image width.
Pick one of nine anchor positions for a single stamp, or toggle Tile mode to repeat the watermark diagonally across the entire image.
Click Apply watermark and preview to see the result, then download the watermarked image.
Testing your result
Test the tool by uploading a landscape photograph and adding a text watermark set to 30% opacity at bottom-right. Verify the downloaded image shows the text legibly but without dominating the photo. Then switch to tile mode with the same text and confirm the watermark repeats diagonally across the entire image. For logo watermarks, use a small transparent PNG and verify that the transparent areas of the logo do not obscure the underlying image. Download the result as PNG and confirm that alpha transparency is preserved in the output.
Common mistakes
Using a JPEG as the watermark image instead of a transparent PNG — JPEG does not support transparency, so the logo will have a solid white or colored background block.
Setting opacity too high for a decorative watermark, making the image difficult to evaluate for its actual content.
Choosing JPEG output when you need to preserve transparency in the watermarked result — JPEG fills transparent areas with white.
Forgetting that the tile angle is fixed (minus 30 degrees for text, grid-aligned for images) and cannot be customized.
Assuming the watermark is removable — it is baked into the pixel data permanently.
Edge cases and options
The Canvas API handles all rendering and compositing, which means the watermark is composited using the browser's native alpha blending. PNG and WebP output formats preserve transparency correctly, while JPEG output fills any transparent pixels with white since the JPEG format does not support an alpha channel. The tile mode for text watermarks uses a fixed minus 30-degree rotation angle, which is the standard angle used by stock photography agencies for proof watermarks. Image watermarks in tile mode are placed on a grid alignment. The size slider scales the watermark as a percentage of the base image width, so the watermark maintains consistent relative size regardless of the source image dimensions.
Real-world use cases
Photographers adding their name or website URL to proof galleries before delivering final edited images to clients.
Stock photo contributors creating watermarked preview versions that prevent unauthorized full-resolution downloads.
Design agencies stamping client mockups with a 'Confidential' or 'Draft' overlay before sharing internally.
Content creators adding a channel logo watermark to video thumbnails or social media images for brand recognition.
E-commerce stores marking product images with their store name before listing on third-party marketplaces.
Frequently asked questions
Q: Can I use a logo as the watermark?
A: Yes. Switch to image watermark mode and drop a transparent PNG. The logo is scaled to the chosen size percentage of the base image width and positioned at your selected anchor point.
Q: What does Tile mode do?
A: Tile repeats the watermark in a diagonal pattern across the entire image. Text watermarks tile at minus 30 degrees, while image watermarks use grid alignment. This makes removal by cropping impractical.
Q: Is the watermark removable?
A: No — the watermark is composited into the pixel data when the canvas exports the final image. Treat it as permanent for anyone who receives the downloaded file.
Q: Does it preserve transparency in the output?
A: Yes, if you choose PNG or WebP output. JPEG output fills transparent areas with white because the format does not support an alpha channel.
Q: What image formats can I upload?
A: Any format the browser can decode, which includes JPEG, PNG, WebP, GIF, BMP, and SVG. The output format is chosen at download time.
Q: Can I adjust the tile angle?
A: No — the tile angle is fixed at minus 30 degrees for text and grid-aligned for images. These are the standard angles used in professional proof watermarking.
Start using it now
Try the Image Watermark tool. See also Image Cropper, Image Resizer, and Image Filters.
