Simple, but GOOD! Mergely offers a great little tool for comparing / merging two sets of text within your browser. Like the merge function in Word, but a LOT easier to manage. Head over to their site and you will be greeted with two side by side text editor windows. There aren’t a lot of buttons to mess with. Differences in text between the two panes are shown in red with a line through on the left and in blue on the right. Left is the original document and right is the “changed” document. Paste two different sets of text into each window, or type up text right into the boxes. No username or password required. Save your files, and send the link to the page to others for their input. The few buttons at the top allow you to replace left / right, swap left / right, clear text box, download file or search. The text is removed immediately after use, unless you save it.
Clearly this is directed at developers and can compare different sets of HTML coding for variations easily in the browser. It’s free, but requires and HTML5 friendly browser. It appears the creators have more plans for it, including multiple file, drag and drop, and cross browser file uploading, font and style settings and three way merging. Sweet!