Links

On Collecting WeChat Chat Logs from End Users

WeChat for Mac&Windows are able to back up chat history from phones to the computer. Unfortunately the chat history is encrypted in a SQLite db.
According to this and various other Chinese articles, the password is based on the IMEI of the device as well as a WeChat-internal UserID that needs capturing network events to retrieve.I feel that this is too technical to ask an average user.
Alternatively, many third-party software provides the ability to export WeChat chat history, such as Cok and this.