Question 1

Does this tool upload my image to a server?

Accepted Answer

No. Your image never leaves your browser. The watermark is applied entirely using the HTML5 Canvas API on your device. No files are uploaded, no data is stored.

Question 2

What image formats are supported?

Accepted Answer

You can upload any image format your browser supports — typically JPEG, PNG, GIF, WebP, and BMP. The output is always downloaded as a high-quality PNG file.

Question 3

How do I control the watermark transparency?

Accepted Answer

Use the Opacity slider (10–100%). Lower values make the watermark more transparent. 70% (the default) gives a visible but non-intrusive watermark that is common for copyright protection.

Question 4

Can I choose where the watermark appears?

Accepted Answer

Yes. Click any position in the 3×3 grid to place the watermark in one of nine positions: top-left, top-center, top-right, middle-left, center, middle-right, bottom-left, bottom-center, or bottom-right. A 20-pixel padding is applied from the edges.

Question 5

Is the original image quality preserved?

Accepted Answer

The canvas preserves the original image dimensions. The download saves a PNG at the same resolution as your original. JPEG originals will be converted to PNG on download, which may slightly increase file size but avoids JPEG compression artifacts.

Bild-Wasserzeichen-Tool

Häufig gestellte Fragen