I diary is traditionally a private way to reflect on different things. A diary quite often contains personal details and feeling expressed by the author. At no point should a diary be read or shared with anyone without the readers permission. A blog however is alot more open to the general public and viewed quite often by anyone. The contents of a blog are written to entertain or inform the reader compared to the diary.



It depends on what the author is intending on doing. If he wants to have his entry read by the public then he or she would choose to do a blog instead of a diary.