Image Watermark Tool
Add text watermarks with position & opacity
100% Private & In-Browser
Processed locally using client-side JavaScript. Your files and data never touch any server.
Instant & Unlimited
No registration, no waiting queues, and no limits on file conversions or generations.
What is Image Watermark Tool?
Add text watermarks to images with control over position, size, color, rotation and opacity. Protect your photos before publishing — everything renders locally.
How to use Image Watermark Tool
Open Image Watermark Tool in any modern web browser on your computer, tablet, or smartphone.
Select, drag, or drop your file directly into the Image Watermark Tool workspace.
The tool processes your data in real time directly on your device using HTML5 Canvas hardware acceleration, WebAssembly image decoders, and offscreen bitmap buffers.
Copy your generated result to your clipboard, preview the output, or save your file with a single click.
- Cross-Platform Compatibility — works the same across Windows, macOS, Linux, iOS, and Android.
- No Account, No Email, No Watermarks — open the page and start working immediately.
- Real Image Processing — Canvas and WebAssembly decoders handle your pixels locally, at full resolution.
- Add text watermarks with position & opacity
- Running a quick one-off task — once loaded, most tools keep working even if the connection drops.
- Add text watermarks to images with control over position, size, color, rotation and opacity. Protect your photos before publishing — everything renders locally.
- Photographers, graphic designers, frontend engineers, and digital marketers who need to process and compress visual media without uploading gigabytes of data without installing software.
- Handling private or confidential material that should not be uploaded to third-party cloud services.
Frequently Asked Questions
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