Ctrl+Shift+F formats the selected line(s) or the whole source code if you haven't selected any line(s) as per the format specified in your Eclipse, while Ctrl+I gives proper indent to the selected line(s) or the current line if you haven't selected any line(s). try this. or more precisely
The Ant editor that ships with Eclipse can be used to reformat
XML/XHTML/HTML code (with a few configuration options in Window > Preferences > Ant > Editor).
You can right-click a file then
Open With... > Other... > Internal Editors > Ant Editor
Or add a file association between .html (or .xhtml) and that editor with
Window > Preferences > General > Editors > File Associations
Once open in the editor, hit ESC then CTRL-F to reformat.