Is Anne Frank legacy her diary?

Yes.

She brought to life a typical girl who became a Holocaust victim.

Millions of people have identified with her.

Can you explain why its a legacy?

Here's the most pertinent definition from the MacMillan Dictionary.

"something that someone has achieved that continues to exist after they stop working or die"

What Anne achieved with her diary was world recognition of a typical Holocaust victim.

Yes, Anne Frank's diary is a significant part of her legacy. It is a firsthand account of her experiences as she and her family hid from the Nazis in Amsterdam during World War II. Anne's diary chronicles her thoughts, emotions, and daily life in the secret annex, where she and her family lived for over two years. She wrote about her dreams, fears, and aspirations, making her experiences relatable to readers worldwide.

To confirm that Anne Frank's diary is indeed her legacy, you could search for information about her life and the impact of her diary. Reliable sources such as biographies, historical websites, or museums dedicated to Anne Frank can provide information on the significance of her diary in preserving her memory and historical understanding of the Holocaust. You can also read excerpts from her diary or watch interviews with historians and experts to gain further insights into its importance.