CrystalDiskInfo is a free disk health monitoring tool for Windows from Crystal Dew World. It reads S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) data directly from hard drives and SSDs to display a simple health status, such as Good, Caution or Bad, along with real-time temperature, power-on hours, and detailed raw S.M.A.R.T. attribute values. It's widely used to catch early warning signs of drive failure before data loss occurs, and can run quietly in the system tray for ongoing temperature and health monitoring.
CrystalDiskInfo vs. Windows' Built-In Drive Status Tools
Windows' own tools, like the "Optimize Drives" utility or basic Properties dialog, don't expose S.M.A.R.T. data in a readable way. CrystalDiskInfo translates raw S.M.A.R.T. attributes into a clear health summary and live temperature reading, giving an early-warning signal for failing drives that Windows' native interface simply doesn't surface.
CrystalDiskInfo Features
- S.M.A.R.T. Monitoring — reads and interprets raw S.M.A.R.T. attributes from drives
- Health Status Summary — shows an overall Good/Caution/Bad rating at a glance
- Real-Time Temperature — displays live drive temperature with optional alerts
- System Tray Monitoring — runs in the background with a tray icon showing current status
- Multi-Drive Support — monitors all connected hard drives and SSDs, including external and NVMe drives
- Power-On Hours & Count — tracks how long and how many times a drive has been powered on
- Alert Notifications — can notify by sound, email or balloon tip when health status changes
How to Install CrystalDiskInfo on Windows
- Download the installer or portable ZIP from the official link on this page or crystalmark.info.
- Run the installer if you chose that version, watching for any optional bundled offers to decline.
- Or extract the portable ZIP if you'd rather run it without installing anything.
- Launch CrystalDiskInfo to see the health status of all connected drives immediately.
- Enable "Resident" mode in settings if you want it running continuously in the system tray.
Is CrystalDiskInfo really free?
Free. CrystalDiskInfo is free to download and use, distributed by Crystal Dew World; there is no paid version, though the developer accepts optional donations.
How to download CrystalDiskInfo safely
Use the request button on this page and we will email you the current link for crystalmark.info — the publisher's own website — so you receive the authentic build. We do not host, mirror, patch or repackage this software in any way.
Avoid third-party "download manager" sites offering CrystalDiskInfo. They commonly wrap the genuine installer in their own bundler, which is how adware and browser hijackers get onto a machine that the user believed was clean.
Alternatives to CrystalDiskInfo
Other free system utilities software worth comparing before you decide:
CrystalDiskMark
Companion benchmark tool for testing drive read/write speeds.
HWiNFO
Detailed hardware information and monitoring tool.
Frequently asked questions
Is CrystalDiskInfo free?
Yes, it's completely free with no paid tier.
Does CrystalDiskInfo work with SSDs and NVMe drives?
Yes, it supports HDDs, SATA SSDs and NVMe drives, though the specific S.M.A.R.T. attributes shown can vary by drive type and manufacturer.
What does the health status "Caution" mean?
It means one or more S.M.A.R.T. attributes have crossed a warning threshold, worth backing up your data and watching the drive closely, though it doesn't always mean imminent failure.
Can CrystalDiskInfo predict drive failure?
It can't predict failure with certainty, but S.M.A.R.T. data often shows early warning signs like reallocated sectors, which CrystalDiskInfo surfaces before a drive fails completely.
Does CrystalDiskInfo run on startup?
It can be configured to launch at Windows startup and sit in the system tray for continuous monitoring.
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