A watermark says who made a picture without getting in the way of it. This page writes text -- a name, a studio, a URL -- rather than placing a logo. Drop in an image, type the words, put them in a corner or run them from one corner to the other, then download the result.
One at a time here, because where a watermark should sit is a judgement about the picture in front of you rather than a setting you make once for twenty.
The bottom right is the usual choice and stays out of most compositions. Corner to corner, or repeated across the whole picture, is much harder to crop away.
One file, lettered and compressed in the same pass.
The bottom right is conventional and keeps out of the way of most photographs. If the point is to make an image awkward to reuse, running the words corner to corner or repeating them over the whole picture is far harder to crop out than a single corner.
No. The lettering is drawn by your browser, on a canvas, before anything is uploaded. The watermarked copy is then sent for optimisation, just like every other image processed here.
Not here. This page writes text. A logo means a second file to upload and a second set of choices about size and placement, which is a different tool rather than another setting on this one.
Each colour is drawn with a thin outline in the opposite shade, so white lettering keeps a dark edge and dark lettering a light one. That carries most pictures. Where it does not, change the colour or raise the strength.
No, and nothing here claims to. A visible watermark makes casual reuse obvious and inconvenient. It is not protection: anyone determined can crop it off or paint it out.
The size is a proportion of the picture's shorter side rather than a number of pixels, so one setting looks the same on a small image and a large one. Six per cent is a readable starting point.
Free Online Image Optimizer