Watermark Adder
Add a text watermark to any image — single position or tiled across.
Written by Anil Gautam · Updated
How big should a text watermark be?
Size runs from 14 to 120 and is measured in the image's own pixels, so the same setting looks very different from photo to photo. At the default 36, the text height is about 3.3 percent of the width of a 1080-pixel social image and 0.9 percent of a 4000-pixel camera photo. Even the maximum of 120 is only 3 percent of a 4000-pixel width. For large camera files, reduce the width first in the Bulk Image Resizer, then add the mark.
Opacity runs from 10 to 100 percent and starts at 65, and the color starts as white. The text box is pre-filled with OneClickUse.com, so replace it with your own name or handle before you download. Text is drawn in a bold system font.
Where does the watermark land?
The four corner positions keep the text about 30 pixels from both edges, and Center places it in the middle. Tiled across image rotates the whole pattern around the centre of the photo by the Tile angle, from -90 to 90 degrees, with -30 as the default. Rows are four times the text size apart. Along each row, copies repeat at four times the size or at the text width plus 60 pixels, whichever is larger. At size 36, a line of text 300 pixels wide repeats every 360 pixels, with rows 144 pixels apart.
Negative angles make the text climb from lower left to upper right, and positive angles slope it downward. Bigger text spreads the pattern out: at 120 the rows sit 480 pixels apart, so a small image may show only a couple of copies. White at 65 percent can vanish against sky or snow, so switch the color to a dark shade on bright photos.
What does the downloaded file contain?
The download is a PNG called watermarked.png at the full pixel size of your original. PNG stores every pixel without loss, so a watermarked camera photo usually ends up larger than the JPG it came from; run it through the PNG to JPG Converter if you need a smaller upload. The image is redrawn from its pixels, so EXIF details in the original, such as camera model and GPS location, are not copied over.
The preview redraws as you type or move a slider, and Choose another image swaps the photo while keeping your text and settings. Everything happens on a canvas in your browser.