You got documents from different type of people and you would like just to download the docs as individual format

step 1 : Visit the Following link by Click Here 
step 2 : Press “Add to Chrome ” Button , Mini window will pop up , press “Add App” button

Step 3: Go to your email with .rar or .zip file attachment. 

Step 4: When a new tab open up with app , authorise the app to can view the .zip and .rar files to extract them 

Your docs can be found in left hand side of the screen, hope that ease to you open .zip and .rare file