How to use it
- Click Choose files or drop your photos on the box. Several photos get the same watermark.
- Choose a Watermark type: type a Text, or choose a Logo image from your device.
- Pick a Position (or Tiled across the picture), then set the size, Opacity and Rotation while you watch the preview.
- Click Add watermark, then download each picture or all of them as a ZIP.
Size, opacity and rotation
A text watermark is sized as a share of the shorter side of the picture, so it looks the same on a small photo and a large one. A logo is sized as a share of the picture's width and keeps its shape. Opacity sets how much of the picture shows through the watermark, and the rotation turns it about its centre.
Positions and tiling
The nine positions keep the watermark a small distance from the edges. A tiled watermark repeats across the whole picture on a grid that reaches the corners even after a turn, which makes it hard to crop out.
What a watermark does and does not do
A watermark marks a picture as yours or as a copy of a source; it does not stop anyone from cropping it or painting over it. Use one you have the right to use: a name, a logo or a web address of your own. The picture is written again, so the photo's camera and location data are not carried into the new file.
Example: a logo on a batch of product photos
You have twelve product photos and a transparent PNG logo. Choose Image (logo), set the logo width to about 20 % of the picture and position it at the bottom right with an opacity of about 70 %. The preview shows the first photo; the batch gets the same placement on each picture.
The results come back as one ZIP with -watermark added to each name, and the originals stay on your device unchanged.
Frequently asked questions
Can I put Turkish letters or emoji in the text?
Yes. The text is drawn by your browser, so Turkish letters such as ş, ğ and ı appear correctly. Emoji depend on the fonts your device has, so they may look different on another device.
Does the watermark protect my photos from being copied?
No. A watermark only shows who the picture belongs to or where it came from. Anyone can crop it or paint over it, so it is a mark, not a lock.
Why does the watermark look faint on some photos?
A light colour with a soft shadow reads best on dark areas, and a dark colour on light ones. Raise the opacity, or turn on the shadow, to make it stand out on a busy photo.
Can I add the same watermark to many pictures at once?
Yes. Add up to 50 photos, set the watermark once and download all the results as one ZIP file. Each picture keeps its own name with -watermark added.
Are my photos uploaded when I add a watermark?
No. Your browser draws the watermark on each picture on your own device. You can check this by turning off your internet connection after the page has loaded.
Sources
- MDN: CanvasRenderingContext2D.fillText(), drawing text on a picture
- MDN: CanvasRenderingContext2D.shadowBlur, the soft shadow
Figures and text last checked on Tuesday, November 10, 2026.