Upload
Choose the image to protect.
Add Watermark to Image
Place a text or logo watermark with adjustable position, size, and opacity.
Your files are processed locally in your browser and never uploaded.
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How it works
Customize
Add text or a logo and adjust its appearance.
Download
Apply the watermark locally and save it.
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Why use OneTools
Text or logo
Use a label or a separate brand image.
Flexible placement
Choose common positions and tune size and opacity.
Browser privacy
Both images remain on your device.
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Popular use cases
- Brand product photos
- Mark preview images
- Credit photography
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Frequently asked questions
Can I use a transparent logo?
Yes, upload a PNG or WebP logo with transparency.
Can I change opacity?
Yes, opacity and size are adjustable.
Are files uploaded?
No, the watermark is rendered in your browser.
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