Downloading Veoh, a free program that lets users to stream movies in full, will allow one to view any episode of Naruto online. Veoh is a very efficient program that works much like a common media player and can be downloaded for free.

When searching for episodes of Naruto, it is best to use this format:
Naruto [Episode Number] [Tags]

Common tags include ([Language] Sub), meaning it is subtitled in the given language, and (Dub/Dubbed), meaning it has a logo somewhere on the screen.

Examples:
Naruto 17 English Sub
Naruto 63 Dub

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The Veoh website:
http://www.veoh.com/