Web addresses should be kept on one line whenever possible. If it is necessary to break a web address, do so before a form of punctuation, (i.e., hyphen or period) or after a slash (/). Do not add a hyphen at the end of the line.
After line break:
In running text, drop the “http://” or “www” before a web address unless the site will not load without it.
It can be helpful to style the address in a different typeface from the accompanying text (italic type within roman copy, for example) so the reader comprehends it at a glance.
Sentence capitalization rules apply. The first letter of a sentence is always capitalized, whether it’s the e in eBay, or the i in iPod.
If an Internet or e-mail address falls at the end of a sentence, conclude with a period or other end punctuation. This will not confuse most readers.
When writing for an online environment, where a link must be active, make sure that the hyperlink destination does not include the final period, which can result in a broken link. Hyperlinks can usually be edited.
Some programs automatically make everything following “http://” active until they reach a space, which means they may include the period or other terminal punctuation. In this case, edit the link or rewrite the sentence so that the URL or e-mail address doesn’t come at the end.