CrystalDiskMark Portable – pre‑packaged, password‑protected portable edition of the industry‑standard disk benchmark. Fast, reliable, zero‑install. For Windows 10/11.
CrystalDiskMark is the industry‑standard open‑source utility for measuring the sequential and random read/write performance of SSDs, HDDs, USB drives and NVMe storage.
This repository distributes a pre‑packaged portable edition that runs instantly without installation – perfect for technicians, reviewers and power users who need quick, accurate benchmark results on any Windows machine.
- Why Use This Portable Build?
- Key Features
- Benchmark Profiles Explained
- What’s New in 9.0.x
- How to Download & Run
- System Requirements
- Frequently Asked Questions
- License & Credits
- Zero installation – just unzip and double‑click
CrystalDiskMark.exe. - No registry changes – leaves the host system untouched.
- USB‑friendly – carry it on a flash drive and benchmark any PC.
- Always the latest stable core – based on CrystalDiskMark 9.0.3 (May 2026)[reference:2].
- Password‑protected archive – prevents tampering and ensures file integrity.
| Feature | Description |
|---|---|
| Sequential Read/Write (SEQ1M) | Measures large‑block throughput – ideal for copying large files. |
| Random 4K Read/Write (RND4K) | Simulates real‑world OS and application I/O. |
| Queue Depth 32 (Q32T1) | Tests NVMe drives under high queue depths[reference:3]. |
| Multiple Test Data | Random, 0Fill, 1Fill – exposes controller behaviour. |
| Customisable Runs | 1–9 passes (default 3 in v9)[reference:4]. |
| Export Results | Save as text, CSV or image for reports. |
| Dark / Light Themes | Shizuku & Aoi themes included[reference:5]. |
| 44 Languages | Fully localised UI. |
| Profile | What It Tests | Typical Use Case |
|---|---|---|
| SEQ1M Q8T1 | Sequential 1 MiB blocks, 8 queues, 1 thread | Large file transfers, video editing |
| SEQ1M Q1T1 | Sequential 1 MiB blocks, 1 queue, 1 thread | Everyday file copies |
| RND4K Q32T1 | Random 4 KiB blocks, 32 queues, 1 thread | NVMe / high‑end SSD stress test |
| RND4K Q1T1 | Random 4 KiB blocks, 1 queue, 1 thread | OS boot, application launch |
| Mix (optional) | Mixed read/write workload | Real‑world multitasking |
- Updated DiskSpd 2.2 core – more accurate results on modern controllers[reference:7].
- Flash‑Memory Profile – automatic optimisation for USB flash drives[reference:8].
- Default 3 passes – faster benchmarking without sacrificing reliability[reference:9].
- New Shizuku & Aoi themes – TenmuShinryuusai and AnimalEars[reference:10].
- Bug fixes for certain environments (9.0.1) and language‑file updates (9.0.2)[reference:11].
- Download the archive from the repository (see the GitHub Pages landing page for a direct link).
- Extract
CrystalDiskMark_Portable_v9.0.3.zipusing the passwordCDM2026. - Run
CrystalDiskMark.exe– no installation required. - Select the target drive, choose a profile and click All to start the benchmark.
Tip: For NVMe drives, use the RND4K Q32T1 profile to see the full performance potential.
| Component | Minimum | Recommended |
|---|---|---|
| OS | Windows 7 SP1 | Windows 10 / 11 (64‑bit) |
| CPU | 1 GHz | 2 GHz+ dual‑core |
| RAM | 512 MB | 2 GB+ |
| Disk Space | 20 MB | 50 MB (for results) |
| Privileges | Standard user | Administrator (for low‑level access) |
Q: Is this the official CrystalDiskMark?
A: Yes – the executable is the original, unmodified CrystalDiskMark 9.0.3 portable build. This repository only repackages it for convenient distribution.
Q: Why is the archive password‑protected?
A: To ensure that the file you download is exactly the one we published and has not been altered.
Q: Can I run it from a USB drive?
A: Absolutely – the portable edition writes no files outside its own folder.
Q: Does it work on Windows 11?
A: Yes, CrystalDiskMark 9.x is fully compatible with Windows 11[reference:12].
Q: Where can I report a bug?
A: Please open an issue on the GitHub Issues page. For security‑related matters, see SECURITY.md.
- CrystalDiskMark is developed by Crystal Dew World (Noriyuki Miyazaki) and is released under the MIT License.
- This repository merely provides a portable packaging of the official binaries.
- CrystalDiskMark logo and icons are property of their respective owners.