About CrystalDiskMark
CrystalDiskMark is a simple disk benchmark software. It is widely used to measure sequential and random read/write performance of storage devices on Windows.
What is CrystalDiskMark?
CrystalDiskMark is a free benchmark tool that tests your disk’s performance. It supports Windows from XP through Windows 11 and Server editions, and runs on x86, x64, and ARM64. The benchmark engine is powered by Microsoft DiskSpd (MIT License). Multiple editions are available: Standard, Shizuku, and Aoi—each with the same core functionality but different themes.
The program was first released in 2007 and has been updated regularly. It has been updated regularly since 2007. CrystalDiskMark is widely cited in hardware reviews and forums as a standard tool for measuring storage speed. It does not collect personal data; it runs locally and only reads/writes test files on the drive you select.
Technology and Benchmark Engine
Since version 4.0 (2015), CrystalDiskMark has used Microsoft DiskSpd as its benchmark engine. DiskSpd is an open-source storage performance tool from Microsoft, released under the MIT License. CrystalDiskMark’s UI runs the tests (sequential, random, mixed, with configurable block size, queue depth, and threads) and displays the results in a simple grid. Support for NVMe, SATA, RAID, and network drives depends on Windows and the drivers; CrystalDiskMark works with whatever drives Windows exposes to the user.
Technical details on test parameters and compatibility are available in the program’s main window and menu.
Version History (Summary)
CrystalDiskMark has been updated regularly since its first release. Below is a short overview.
| Version | Date | Notes |
|---|---|---|
| 9.0.2 | 2026-02-17 | Language updates |
| 9.0.1 | 2025-06-19 | Benchmark fix in some environments |
| 9.0.0 | 2025-06-16 | New themes, DiskSpd 2.2, default runs 3 |
| 8.0.6 | 2024-11-20 | Shizuku/Aoi themes, dark mode menu |
| 8.0.0 | 2020-11-20 | New UI (Project Priscilla), Win10 dark mode |
| 7.0.0 | 2019-11-01 | Peak/Real World, Mix test, ARM64 |
| 4.0.0 | 2015-04-30 | Benchmark core: Microsoft DiskSpd |
| 1.0.0 | 2007-03-31 | Initial release |
Version history is maintained by the developer.
License
CrystalDiskMark is distributed under the MIT License. You can use, modify, and distribute it in accordance with the license terms. The benchmark core uses Microsoft DiskSpd, also under the MIT License.
CrystalDiskMark is distributed under the MIT License.
Acknowledgments
CrystalDiskMark uses Microsoft DiskSpd for the benchmark engine. Thanks to the developers and contributors of DiskSpd and to the CrystalDiskMark team. Theme and translation contributors are credited by the developer.
Theme and translation contributors are credited by the developer.
Contact
For official support, bug reports, and feature requests, please use the developer’s contact page. This website is a fan resource and is not operated by the CrystalDiskMark authors.
For support and bug reports, refer to the developer’s contact channels.
Support Development
You can support CrystalDiskMark development via the developer’s contribution options or GitHub Sponsors. The developer offers tiered support levels. The ad-free ZIP edition is available from the developer.
Why This Site Exists
CrystalDiskMark is popular worldwide, but the official documentation is spread across several pages. This fan site brings together a single place to learn what CrystalDiskMark does, how to run a benchmark, which edition to download, and how to fix common issues. We also collect user experiences and tips so you can compare your results and troubleshoot faster. We are not the developer; we just want to make it easier to get started and get accurate, comparable results.
Privacy and Security
CrystalDiskMark runs entirely on your PC. It does not send benchmark results or personal data to any server. It only reads and writes test files on the drive you select. Installers and binaries are digitally signed so you can verify they come from the developer.
About This Website
This site is an independent, fan-made resource for CrystalDiskMark. We provide guides, FAQ, user experiences, and download information.