Image Watermark
How to use this image watermark tool
- Choose an image and type your watermark text.
- Adjust position, opacity, and size to taste.
- Click "Download Image" to save the watermarked version.
How does this work?
Your image is drawn onto an HTML canvas with the watermark text overlaid, then exported as a PNG — everything happens on your device, nothing is uploaded.
Can I add a logo instead of text?
This version supports text watermarks only. For a logo overlay, you'd need an image-editing tool that supports layering two images.
Does watermarking reduce image quality?
The image is re-encoded as PNG when exported, which is lossless, so quality is preserved aside from the watermark text itself being added on top.
Why watermarks deter casual reuse but don't stop determined theft
A visible watermark's main function is raising the effort required to reuse an image without permission — it doesn't make an image technically impossible to steal, since anyone with basic photo-editing skills and enough patience can remove a watermark, especially one confined to a corner. What a watermark actually accomplishes is discouraging casual, low-effort reuse (a random social media repost, a blog pulling an image via right-click) and providing visible attribution for whoever does see it before any removal happens. If your real goal is preventing determined, professional misuse of high-value images, a visible watermark is one layer among several you'd want, not a complete solution on its own.
Placement and opacity tradeoffs
Where you place a watermark and how visible you make it involves a direct tradeoff between protection and how much it interferes with viewing the image. A corner watermark at low opacity is unobtrusive and doesn't distract from the image, but it's also the easiest kind to crop out entirely or paint over with content-aware fill tools, since it only affects a small, isolated area. A watermark placed across the center of the image, or repeated diagonally across the whole frame, is much harder to remove cleanly without visibly damaging the image underneath, but it's also far more disruptive to actually look at — which is exactly why preview images intended to prevent theft (stock photo previews, for instance) use large, centered, high-opacity watermarks, while personal photo sharing usually favors a subtle corner mark instead.
Watermarking vs. other protection methods
A visible text watermark is only one of several ways to mark ownership of an image, and each serves a different purpose. Embedding copyright information in the image's metadata (EXIF or IPTC fields) survives casual viewing invisibly, but it's trivial to strip and isn't visible to someone just looking at the image, so it works better as supporting evidence than as a deterrent. Invisible (steganographic) watermarking encodes an identifying pattern directly into the pixel data in a way that survives some editing and isn't visually apparent, but requires specialized detection software to read back out. Reverse image search (services like Google Images or TinEye) is a complementary, after-the-fact approach — rather than preventing reuse, it helps you discover where an unwatermarked or watermark-stripped image has been reused elsewhere.
Why text watermarks are removable, and what that means for how you use one
Modern content-aware fill and generative inpainting tools have made removing a simple corner text watermark from an image straightforward, even for someone without traditional photo-editing skill, since the tool only needs to reconstruct a small, usually low-detail area based on the surrounding pixels. This has shifted watermark design in recent years toward larger, semi-transparent overlays that cross significant portions of the actual image content, since removing a watermark that overlaps detailed, high-frequency image content (faces, textures, fine detail) is far harder to do convincingly than removing one sitting in an empty corner or plain background. If deterring removal matters more to you than keeping the watermark subtle, size and placement matter more than the exact wording.
Limitations of this tool
This tool supports a single text watermark per image, placed at one of five preset positions, with adjustable opacity and size — it doesn't support image or logo overlays, tiled or repeating watermark patterns, or rotated/diagonal text, all of which would require more advanced canvas compositing than a simple text-and-position tool provides. It also always exports as PNG regardless of the original format, since drawing new content onto a canvas and exporting it needs a format that can be generated reliably in-browser — if you need the output back in the original format (JPG, for instance), you can run the download through this site's image converter afterward. Font rendering also depends on what fonts are available on your specific device, so the exact appearance of the watermark text can vary slightly between different computers and operating systems.