Hitler would be almost 130 years old if he were alive today. (Born Apr. 20, 1889)
And, I believe, had he escaped, the world woulda soon known, as it was not in his nature to keep a low profile. That's how Frank Sinatra responded to the argument that Elvis was still alive & staged his own death to escape from the public eye.
And many of Hitler's homies had tried to get him to leave berlin for safety before it was surrounded.
OTOH, Martin Bormann liked working behind the scene. He was a more-likely candidate for escape. while the rumor he'd escaped persisted for years, his body was found in 1972, and its ID was later confirmed by DNA testing.
One nazi who DID escape successfully was Josef Mengele, the evil doctor who performed deadly experiments on prisoners. He drowned off the Brazilian coast in 1979 after suffering a stroke while swimming. His remains were positively IDd by a forensics team in 1985.
There were likely many lower nazis who escaped justice, but almost all are dead now. I think even the govt. of Israel has ceased spending money trying to find any more of them, due to the passage of time.