At the U.K. National Archives you can get an excel spreadsheet transcription of the Titanic’s passenger list, or view (and download) a photo copy of the handwritten original passenger list. The U.K. National Archives is a great source for information on Titanic and the White Star Line. If you have not been to their website, you might be surprised at what you can find.
NOTE: Passenger lists from the Titanic will have errors and any person that purchased tickets on the day of sailing may not be on the archived passenger lists. Also, any person who upgraded their ticket on the day of sailing may be listed in the wrong class. Sailing lists and passenger lists were handwritten in 1912 and the most accurate lists would have been onboard the Titanic.