Can I use both text and logo image as watermark?

Yes. Switch tabs: (1) text (font / size / color) (2) logo image (transparent PNG recommended). Brand owners use logo PNG; bloggers use nickname text.

Can I apply the same watermark to multiple photos?

Yes. Drag-drop multiple files, configure watermark once, batch apply. Live preview shows position.

Image Watermark

Q: Are my files uploaded?

No. All processing runs in your browser via Canvas API. The site operator cannot see your photos.

Q: How effective is a watermark for theft prevention?

Photoshop can crop, blur, or restore parts, but it takes time and deters most theft. Strong protection: (1) tile-repeat pattern (2) crossing the center diagonally (3) moderate opacity (40-60%). All supported.

Q: Is the original quality preserved?

The watermark is composited on top of the original pixels. JPG output at quality 95 has negligible visual difference. PNG output is lossless.

Add text or logo watermark to your photos — anti-theft for bloggers, photographers, marketplace sellers.

Your images are not uploaded to any server. All processing runs in your browser.

Drag-drop photos or click to select

JPG, PNG, WebP — multiple files supported

Common use cases

Situation	Recommended watermark
Blog / Instagram photo theft prevention	Text (nickname) + bottom-right + opacity 50%
Marketplace seller photo protection	Text (nickname + date) + center + rotate -15° + tile
Photographer / artist portfolio	Logo PNG + bottom-right + opacity 70-80%
Company report / document	Logo + bottom-right + opacity 60%
Strong leak prevention	Text + tile-repeat + rotation + opacity 30-40%
SNS quote / archive	Text (URL) + bottom-left + opacity 70%

Related tools

Frequently asked questions

Are my files uploaded?

No. All processing runs in your browser via Canvas API.

How effective is a watermark for theft prevention?

Photoshop can crop / blur / restore, but it takes time and deters most theft. Strong protection: (1) tile-repeat (2) cross center diagonally (3) moderate opacity (40-60%).

Can I use both text and logo image?

Yes. Switch tabs: text (font / size / color) or logo image (transparent PNG recommended).

Can I batch apply?

Yes. Drag-drop multiple files, configure once, batch apply. Live preview shows position.

Is the original quality preserved?

Watermark is composited on top of the original pixels. JPG output at quality 95: negligible visual difference. PNG output: lossless.

References

Last verified: 2026-05-10 / Browser native Canvas API (no external libraries).

Canvas API — MDN

⚠️ Watermark deters theft but is not 100% prevention. For valuable assets, also consider low-resolution publishing or copyright registration.