beachdeath:

i don’t know if this is common knowledge or not but anne frank’s diary was not some random document that sprang into existence by accident, she fully intended to publish it and she was actively revising it for publication at the time of her arrest, she desperately wanted to be an author when she grew up and she left behind a substantial amount of fiction (several short stories, a novel in progress) when she died. her diary was not a private stream of consciousness, like, she was writing to communicate with other people and to create a work of literature. there are unabridged editions available which are less polished and include passages that she and her father originally struck from the record, but the most widely available version, probably the one you read, was carefully edited and revised both by her and, after her death, her father.