Is it okay to replace all outlets with GFCI?

While replacing every single standard duplex wall outlet in your home with an individual Ground Fault Circuit Interrupter (GFCI) receptacle is technically permissible and provides maximum shock protection, it is generally unnecessary, expensive, and impractical for several reasons. GFCIs are bulky and can be difficult to fit into older shallow wall boxes. Furthermore, placing multiple GFCIs downstream on the same circuit can cause nuisance tripping where one device interferes with another during power surges. Instead, electrical codes require GFCIs only in moisture-prone areas like kitchens, bathrooms, garages, and outdoors, while upstream GFCI receptacles or circuit breakers can protect downstream standard outlets safely. You can troubleshoot electrical layouts easily by reviewing code guidelines. You can verify that your installation is correct when protecting standard downstream outlets from a single master GFCI saves money and prevents nuisance tripping.