Runs locally — your images are never uploaded

Watermark Adder

Upload an image and stamp a custom text watermark onto it, with control over position and opacity.

How to use the Watermark Adder

  1. Upload the image you want to watermark.
  2. Type your watermark text — a name, website, or copyright notice.
  3. Choose a position: a corner, bottom-center, or a diagonal center watermark.
  4. Adjust opacity, then click "Download Watermarked Image."

About the Watermark Adder

A watermark stamped onto a photo or graphic signals ownership and makes unauthorized reuse noticeably less appealing, since removing a well-placed watermark takes deliberate effort. Photographers, designers, and content creators commonly watermark preview or portfolio images before a client has paid or a print has been purchased, discouraging casual copying while still letting people see and evaluate the work.

This tool stamps your chosen text directly onto the image using canvas, with control over both position — a corner, bottom-center, or a bold diagonal watermark across the center — and opacity, letting you balance how visible the watermark is against how much it interferes with viewing the image underneath. A corner watermark at high opacity works well for firmly marking ownership, while a diagonal center watermark at lower opacity is the more common choice for a preview image meant to still be easily viewable.

It's used by photographers protecting portfolio previews shared online, designers marking draft or sample work before final delivery, and content creators adding a consistent credit line or handle to images shared on social media. Because everything renders using canvas locally, your original image is never uploaded anywhere during the process.

Frequently asked questions

Can I use a logo image instead of text?+
This tool is designed for text watermarks; for a logo-based watermark, an image editor with layer support would be needed.
Will the watermark be visible if someone tries to crop it out?+
A corner or bottom watermark can potentially be cropped out of an image; a diagonal center watermark is significantly harder to remove without visibly damaging the image, if strong protection against reuse is the goal.
What opacity should I use?+
Lower opacity (around 40-60%) works well for a subtle credit line that doesn't distract from the image; higher opacity is more effective if the goal is actively discouraging unauthorized reuse.
Does the watermark reduce the image's resolution?+
No, the watermark is drawn directly onto the image at its original resolution — only the visual content changes, not the pixel dimensions.

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