The one problem with any photo editing programme is that you have to have it installed on your machine before you can start tinkering with a picture. That's why the website Pixlr.com might appeal to people who only have an occasional interest in finessing their photos. Visitors to the site can find Pixlr Express, a free and speedy interface, where they can do things like crop and rotate photos or add effects.
Once called up, the application works like a regular programme, just confined to a browser. All standard editing functions, like changing formats, matching colours, changing size and cropping are available and seem to work rather intuitively. There's also a selection of effects, stickers and frames, as well as the option to insert lines of text.