Can you get banned for alt accounts?
You will not get banned just for having alt accounts on Roblox. Multiple accounts are allowed, and plenty of players keep alts for trading, testing games or playing with friends. What gets you banned is what you do with them. Using an alt to dodge a ban, break a game rule or harass someone is against the rules no matter how many accounts you own. Legit alts are fine.
The safe way to run those legit alts is a manager that signs in cleanly. The BetterLauncher Roblox account manager keeps your accounts on your machine, encrypted for your device and OS user, and signs each one in through Roblox’s own login window, so nothing about how you switch accounts crosses a line.
Alts are allowed, ban evasion is not
Roblox's rules do not punish the existence of a second account. The line they draw is around ban evasion: if an account gets banned and you jump onto a fresh one to keep doing the exact thing that got you banned, that is a violation, and Roblox can action the new account too. That is the whole distinction. An alt is a normal account you also happen to own. A ban-evasion account exists to escape a punishment. Keep your alts on the first side of that line and you are not at risk.
Running several accounts safely
Opening more than one Roblox client at a time is also fine. Multi-instance play, two or three windows for your own accounts, is not something Roblox moderates against, because again the rules are about conduct. If you want several clients open at once, that is BetterStrap, our bootstrapper — BetterLauncher switches between your accounts rather than running them side by side. Where people actually create risk is in how they store their logins. Pasting a .ROBLOSECURITY cookie into a random tool is the real danger here, not the alt itself, since that cookie is a full login and handing it over can lose you the account.
Manage legit alts the boring way
A good account manager sidesteps the risky part entirely. Rather than sending you off to copy a login cookie, it stores your accounts locally on your PC and signs each one in through Roblox's own login window. That is how the BetterLauncher account manager works: your alts live on your machine, encrypted for your device and OS user, and picking one switches you to it and starts Roblox in a click. A paste box is still there for a captcha that blocks the login window, or for importing an alt you already have elsewhere, and what it stores never leaves your machine. Legit alts, handled the boring safe way, keep you well clear of both the ban-evasion line and the account-theft trap.