Do Pakistani citizens need visas for UAE?

Yes. Including Pakistani citizens, foreigners are required a visa when entering the UAE. 

• If you have a visa for Pakistan, it is easy to get a visa for Dubai when you arrive at the airport. There are long lines to register and approve visas, and occasionally unplanned circumstances cause the process to be delayed, so you will need to spend a lot of time on it. 
• To ensure that everything will go according to plan during your holiday, you should submit your online visa application for the UAE before making travel arrangements. 

Thankfully, the Dubai Government has developed a web-based system for applying for UAE visas from eligible nations like Pakistan. To apply for a UAE eVisa from the comfort of their homes, visitors from Pakistan only need to complete a short form. Most visits are brief, and the visa expires after 60 days (2 months).