MCA (also referred to as ‘Anvil’) is a map file format used by computer game Minecraft. MCA replaced older MCR files used for the same purpose. MCA is a considerable advance over its predecessor as it offer many enhancements such as increased block limit or added compression features useful for larger and more complex designs.

Minecraft was released in 2009 and since 2014 it is owned by Microsoftu. The game itself is available for many different system platforms, yet MCA files are only supported by Minecraft Java Edition for PC.