CrystalDiskMark is an open source disk drive benchmark tool for Microsoft Windows from Crystal Dew World.

Based on Microsoft's MIT-licensed Diskspd tool,[2] this graphical benchmark is commonly used for testing the performance of solid-state storage.

[6] There is a macOS clone version of it called AmorphousDiskMark developed by Katsura Shareware, named after the non-crystalline amorphous state of solids.

Like CrystalDiskMark, this tool is designed with an emphasis around solid state devices, supporting NVMe connections in addition to the usual PATA and SATA.

Systems Engineer illustrator), and voiced by Sumire Uesaka of KING RECORD CO., LTD.,[30][31] was the second mascot used in Crystal Dew World's software, introduced in CrystalDiskInfo 7.1.0 (2017-08-04).