Yes, folding bikes can go uphill. Most folding bikes are designed to climb moderate inclines, but they may not be as easy to ride uphill as a standard bike due to their smaller wheels and lower gear range. However, with the right folding bike and some practice, you can easily ride up most hills (source: [Folding Bike Hut](https://foldingbikehut.com/can-folding-bikes-go-uphill-a-yes-folding-bike-hut/), [EpicBicycles](https://www.epicbicycles.com/best-bike-gear/folding-cycles/)). To make a folding bike better suited for climbing, you can change its chainring to a smaller size one or invest in extra suspension and better tires (source: [Bike Commuter Hero](https://bikecommuterhero.com/can-folding-bikes-go-uphill/), [Amsterdam Hangout](https://amsterdamhangout.com/is-it-hard-to-ride-a-folding-bike-uphill/)).
A folding electric bike is known for its much smaller wheels than road bikes and mountain bikes as they are initially designed for city rides or commute.
Yes, a folding bike can go uphill but not long uphills. Folding electric bikes lacks sufficient gearing and they are quiet heavy but it can do quiet well on small uphills.
High end folding electric bikes that are designed with lighter parts are could do well in uphill climbs but not as much as a road bike.
