Are you allowed to swear during Ramadan?

no it is not allowed

I don't think there is such a rule to swear or not to swear in Ramadan. but one should be careful before swearing because he may have to pay Kafara if he doesnot fulfil it

you are not alowed to swear in ramadan, and if you are a muslim then you are not allowed to swear at all in your entire life as it causes bad deeds, and effects your soul

There is no rule about swearing in or out of Ramazan. Excessive swearing is not a good habit. However, some times one has to give testimony on oath, then swearing becomes necessary.. However, a Muslim must keep in mind that he has to fulfil his promise, done on oath or otherwise.