It's fine to ask questions that have been asked before. These mentions are for a start to discussion, not to discourage it. More questions, info, and debate are welcome.

You may be interested in the FAQ section https://www.reddit.com/r/AskHistorians/wiki/faq/militaryhistory/wwii/nazigermany#wiki_did_hitler_survive_the_war.3F . In the app, the # URL anchor doesn't work, so you'd look for the section "Did Hitler survive the war?" near the bottom of the page. The two users mentioned there are /u/Bernardito and /u/EtherealEther .

There has also been a recenter posting, "Could Hitler have escaped Berlin in 1945?" at https://www.reddit.com/r/AskHistorians/comments/7l4v7i/could_hitler_have_escaped_berlin_in_1945/drjn32z/ by /u/Beemer2 .

He died in Berlin. Hitler's dentist was captured after the war by the Americans. Two of his dental techs were captured by the Russians. Each independently reconstructed the details of Hitler's dental work from memory. Their reconstructions meshed completely, and they fit with the details of the dental work on the jaw fragments attributed to Hitler AND to the skull X-rays taken of him by his doctor after the July 20 bomb attempt. Bottom line, there is solid forensic proof beyond a reasonable doubt that Hitler died in Berlin. For a detailed account of the forensic exam go to http://www.nl-aid.org/wp-content/uploads/2012/09/Sognnaes.pdf .