Professionals prefer Adobe Photoshop but that comes at a cost. Pixlr is a free solution that offers similar features. This online tool can take care of most image editing needs of both amateurs and professional. To use it, just go to the site. No signup is required. You can start using it instantly. The editor even allows you to create a new image, open images from a computer, URL or library. This editor can be used on mobile devices, too.