The transit rules for Dubai depend on where you are travelling from, where you have transited through, and the requirements of your final destination. It also depends on the countries you have recently visited.
Check the latest rules for transiting in Dubai as a tourist(opens in the same window) or a resident(opens in the same window).
You must also meet the requirements for every country you travel to and transit through on your journey, in addition to your final destination(opens in the same window).
The rules change frequently so check for updates regularly before you travel.