Image Watermark — Free Online Tool
Add custom text watermark to protect your images.
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Upload Image to Watermark
Supports all image formats
About Image Watermark
The Image Watermark tool overlays custom text onto your photos so you can mark ownership or branding before sharing. Adjustable font size and opacity, plus a readable outline, keep the watermark visible across light and dark areas of any image.
All watermarking is done in your browser, so your images are never uploaded to a server. It is a quick, private way for photographers, creators, and businesses to protect images posted online.
How to Use Image Watermark
- Click the upload area and choose an image to watermark.
- Type your watermark text, such as your name or copyright.
- Adjust the font size and opacity to taste.
- Click Apply Watermark, then Download Watermarked to save.
Key Features
Add custom text watermarks to any image
Adjustable font size and opacity controls
Readable outline for light and dark backgrounds
Live canvas preview before downloading
100% client-side processing - images never leave your device
Free to use with no signup
Frequently Asked Questions
Can I control how visible the watermark is?
Yes. Use the opacity slider to make the text bold or subtle, and set the font size so the watermark fits the scale of your image.
Are my images uploaded to a server?
No. The watermark is drawn on a local canvas in your browser, so your images never leave your device.
What format is the watermarked image saved in?
The result is saved as a PNG, which keeps the text crisp and preserves image quality.
Why does the watermark have an outline?
A subtle dark outline is added behind the text so the watermark stays readable over both light and dark areas of the photo.