What is a .MCR file?
MCR is the older Minecraft region format, before Anvil.
- Did you know
- MCR was Minecraft’s region format before the Anvil update raised the height limit.
- MCR was Minecraft Java Edition’s region format from Beta 1.3 onward, before the Anvil update renamed the files to .mca.
- The move to Anvil raised the world’s build height from 128 to 256 blocks by splitting chunks into stacked sections.
- What Analyser reads
- Identify and read more game and emulator files: Unity asset bundles, Unreal cooked assets, CISO/CHD disc images, FMOD/Wwise sound banks, Spine skeletons and atlases, GameMaker/LDtk/TIC-80 projects, Minecraft Anvil regions, Warcraft III maps, Ren Py and RPG Maker data, extra console ROMs (Atari, PC Engine, Master System/Game Gear, WonderSwan, 3DS homebrew), xdelta/Basis patches and emulator saves and movies.
- Depth of analysis
- .MCR is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .MCR file
- Drag a .MCR file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.