This viewer is an app for easy reading of exported WhatsApp chat logs (.txt file). 
WhatsApp chat logs are stored in plain text format. With this tool, you can view the log as if you're viewing it in the app itself.
This app makes unformatted chat file into a nice, easy-to-read format similar in appearance to the WhatsApp GUI.
You can open a txt file to read from your computer, and Google Drive™.