If your desired name is claimed, try clean variations like adding a period ( name.og ) or appending an organizational suffix ( name.hq ) to stay safe without compromising your brand.
Any guide instructing you to turn off Windows Defender or your antivirus software to run the tool is malicious. Safe and Legitimate Ways to Check Usernames discordusernamecheckermainrar link
An unofficial tool almost certainly will. Even legitimate, open-source checkers require you to paste your Discord token into a configuration file, which is a massive security risk. Only use an alt account. If your desired name is claimed, try clean
Reads from plain text files ( usernames.txt ) to process bulk lists line-by-line. Even legitimate, open-source checkers require you to paste
Many of these tools require you to input your Discord to function.
Thankfully, there are legitimate and safer alternatives to using a mystery .rar file. If you want to check a username, here are the best options.