What is Add Watermark?
Add Watermark is a free browser-based image tool. All image processing uses your browser's Canvas API — no file is ever uploaded to a server. Works with JPG, PNG and WebP formats. Results are instant, with no account or software installation required.
This tool lets you add text watermark to image without installing any software or creating an account. Everything runs directly in your browser for maximum privacy. Your files and data never leave your device.
Use it for quick tasks at any time from any device — desktop, tablet or mobile. No subscription, no ads, no limits.
How to use Add Watermark
- Upload the image you want to watermark
- Type your watermark text and choose font size, color and opacity
- Drag to position the watermark — bottom-right corner is standard
- Click Apply Watermark and download your protected image
Why use OnlineToolsPlus?
Image tools on OnlineToolsPlus run entirely in your browser using the Canvas API — no file ever touches a server. This matters for privacy: your photos, screenshots and graphics stay on your device. With 15+ free image tools covering compression, conversion, cropping, OCR, watermarking and more, you can handle any image task without installing software or creating an account.
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Last updated: April 11, 2026
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