There are hundreds, if not thousands, of websites which provide primary source material related to the Holocaust. Some include survivor personal histories, newspaper accounts, government documents, trial transcripts, and so on.
If you try googling to find information, add something like primary sources, documents, diaries, journals, correspondence, interviews, etc. to your search term to get better results. If in doubt about the veracity or authority of a site, ask a librarian or your professor for a second opinion.
A small sample of sites is listed below: