This article provides a comprehensive review and discussion of overcurrent limiting in grid-forming (GFM) inverters. Grid-forming inverters are increasingly used to integrate inverter-based resources and enable 100% power-electronics-based power systems. However, their overcurrent characteristics differ from those of conventional synchronous machines. Therefore, a detailed characterization of GFM current-limiting strategies is needed to assess their performance during off-nominal conditions. Although GFM current-limiting controls are primarily for inverter protection, they significantly impact device-level stability, transient system stability, power system protection, and fault recovery. The article reviews state-of-the-art current-limiting techniques for GFM inverters and outlines open challenges. It introduces graphical methods for intuitive understanding and comparison of current-limiting methods. Various performance criteria, such as fault current contribution, voltage support, stability, and post-fault recovery, are evaluated. The article also discusses the latest standards and trends for inverter dynamics under off-nominal conditions and outlines future development pathways. The article begins by introducing the challenges of GFM current limiting, emphasizing the need for a current limiter that can quickly and accurately limit overcurrents without causing small-signal instability or excessive harmonics. It then discusses direct and indirect current-limiting methods. Direct methods include current-reference saturation limiting and switch-level current limiting, which directly manipulate current-reference or switch signals to limit current. Indirect methods include power set point modulation, virtual impedance (VI) current limiting, and voltage-based current limiting, which indirectly manipulate voltage or power references to limit current. The article also discusses hybrid current-limiting methods that combine direct and indirect approaches to enhance overcurrent limitation capabilities. The article concludes by highlighting the importance of current-limiting methods in ensuring the stability and reliability of GFM inverters during and after faults. It emphasizes the need for further research to develop effective and reliable current-limiting techniques that can meet the demands of modern power systems. The article also discusses the application of current-limiting concepts for single-phase inverters and the challenges associated with adapting three-phase methods to single-phase configurations. Overall, the article provides a comprehensive overview of current-limiting methods for GFM inverters and their impact on system stability and performance.This article provides a comprehensive review and discussion of overcurrent limiting in grid-forming (GFM) inverters. Grid-forming inverters are increasingly used to integrate inverter-based resources and enable 100% power-electronics-based power systems. However, their overcurrent characteristics differ from those of conventional synchronous machines. Therefore, a detailed characterization of GFM current-limiting strategies is needed to assess their performance during off-nominal conditions. Although GFM current-limiting controls are primarily for inverter protection, they significantly impact device-level stability, transient system stability, power system protection, and fault recovery. The article reviews state-of-the-art current-limiting techniques for GFM inverters and outlines open challenges. It introduces graphical methods for intuitive understanding and comparison of current-limiting methods. Various performance criteria, such as fault current contribution, voltage support, stability, and post-fault recovery, are evaluated. The article also discusses the latest standards and trends for inverter dynamics under off-nominal conditions and outlines future development pathways. The article begins by introducing the challenges of GFM current limiting, emphasizing the need for a current limiter that can quickly and accurately limit overcurrents without causing small-signal instability or excessive harmonics. It then discusses direct and indirect current-limiting methods. Direct methods include current-reference saturation limiting and switch-level current limiting, which directly manipulate current-reference or switch signals to limit current. Indirect methods include power set point modulation, virtual impedance (VI) current limiting, and voltage-based current limiting, which indirectly manipulate voltage or power references to limit current. The article also discusses hybrid current-limiting methods that combine direct and indirect approaches to enhance overcurrent limitation capabilities. The article concludes by highlighting the importance of current-limiting methods in ensuring the stability and reliability of GFM inverters during and after faults. It emphasizes the need for further research to develop effective and reliable current-limiting techniques that can meet the demands of modern power systems. The article also discusses the application of current-limiting concepts for single-phase inverters and the challenges associated with adapting three-phase methods to single-phase configurations. Overall, the article provides a comprehensive overview of current-limiting methods for GFM inverters and their impact on system stability and performance.