Number of characters:
Click New String to generate your random string.
New+copy will gen 1x new string, copy to your clipboard, and save to string history on the right.
New bulk uses above string settings to create bulk amount, default 50.
On page load, one 8 character string is generated, along with 50 "bulk" strings in the View Bulk area.
Single and Bulk have seperate histories, clear will only clear single's history. To swap between their views, click view single or view bulk.