Chimera Tool is a specialized software designed for servicing mobile phones. It is widely used by technicians for tasks like: Fixing corrupted firmware or boot loops.
Many manufacturers provide official, free software for basic repairs: Samsung: Use Samsung Smart Switch or Odin for flashing. Google/Pixel: Use the Android Flash Tool . Xiaomi: Use the official MiFlash Tool .
Most "free" cracks are wrappers for Trojans that steal your passwords or banking info.