💧 Image Watermark
Add a customizable text watermark to a photo. Selected images are processed on your device, not uploaded to OpenToolKit servers.
Process your image
No image selected.
How to use Image Watermark
- Select a supported image from your device.
- Adjust the processing settings above.
- Select Process and download and inspect the resulting image.
What to expect
Add a customizable text watermark to a photo. The output is created using your browser's Canvas API. Quality, supported formats, available memory and download behavior depend on the browser. For JPEG, transparent areas may be flattened; check the output before sharing.
Common questions
Are my images uploaded?
No. This tool operates locally within your browser. External analytics and advertising resources may still load; read the privacy policy for details.
Can I process very large images?
Each image is limited to 15 MB and 20 megapixels. Large images may consume significant memory, so processing can fail on devices with limited resources.
Can I use this offline?
After the page and its assets are loaded, the image operation does not need a processing server, but the site itself and advertising resources ordinarily require network access.
Related: all Image Tools · all categories.