There are uncountable ways to copy digital photos out there. On the contrary, we don’t have many solid methods to protect photos online. The toughest method is to watermark online photos. By adding watermark to all digital photos, our photos will carry our signature with them anytime anywhere. Only by this way can we get away from photo copyright infringement. 1. watermark.ws An online photo watermark application from watermark.ws. To use this watermark online tool, you need to have a free account first. Its shining features support photo watermark from local hard drive and Internet. If you have a need to batch add Text, add Logo, add Text Template, Crop, Rotate, Exposure, Resize, Compress, Flip, then this tool is enough. Running is smoothly if you have a good network. 2. PicMarkr PicMarkr is another famous online watermark tool, simplicity is its concept. Easy three-step to go, photo watermark process can be finished.It won’t allow pictures to be loaded from Internet. 3. watermark-images Watermark-images allows to add watermark to 15 photos at a time. The official statement of the watermark is traditional watermark, which is a text watermark. So no image watermark is allowed. Load picture one by one and download 15 text watermark pictures at one time is the performance of it.