CrystalDiskInfo: when to install it, and when not to
CrystalDiskInfo is a free Windows tool that reads S.M.A.R.T. health data from your drives and warns before a disk fails. A sudden temperature spike or a…
The short version
CrystalDiskInfo: Shows the SMART health of every drive in plain language, so you get a warning before a disk dies instead of after. Check any second-hand laptop with this before you hand over money.
| Licence / price | Free · Open source |
|---|---|
| Platforms | Windows |
| Category | System & Hardware — 8 programs |
| Official download | https://crystalmark.info/en/download/ ↗ |
What it is for
CrystalDiskInfo is a free Windows tool that reads S.M.A.R.T. health data from your drives and warns before a disk fails. A sudden temperature spike or a rising reallocated-sector count is the early warning that lets you back up before catastrophe.
When to pick something else
Windows-only, and it reports indicators, not destiny; a scary number is a reason to back up, not a guarantee of failure tomorrow. It is a monitor, not a repair tool, and it will not recover lost data.
How it compares in System & Hardware
These are the alternatives we would consider for the same job. The notes are the same ones used on the main list, so there is no separate ranking hiding on this page.
| Program | Licence / price | Platforms | Why it is on the list |
|---|---|---|---|
| Rufus Publisher's site ↗ | Free · Open source | Windows | Writes a Windows or Linux ISO to a USB stick in a couple of minutes, faster than most vendor tools, and can bypass the Windows 11 TPM and account requirements if you ask it to. No install needed. |
| Ventoy Publisher's site ↗ | Free · Open source | Windows, Linux | Format a USB stick once, then just copy ISO files onto it and pick one from a boot menu. Replaces the whole reformat-burn-reformat cycle. Worth the twenty minutes of learning if you install systems regularly. |
| WizTree Publisher's site ↗ | Free for personal use | Windows | Reads the master file table directly and shows you what is eating your disk in seconds, not minutes, with a treemap view. The fastest way to find the 40 GB you did not know you had. |
| HWiNFO Publisher's site ↗ | Free for personal use | Windows | Reads every temperature, fan speed, voltage and power draw your hardware exposes, and logs it over time. The reference tool for diagnosing a laptop that throttles or a fan that will not stop. |
| CPU-Z Publisher's site ↗ | Free · Closed source | Windows, Android | Tells you exactly which CPU, motherboard and memory you actually have, including real memory timings rather than the marketing numbers. Useful when buying a used machine or checking a second-hand part. |
| CrystalDiskMark Publisher's site ↗ | Free · Open source | Windows, macOS | Measures real read and write speed on a drive so you can tell whether that new SSD is actually performing as advertised. Run it once after any upgrade, then forget about it. |
| Revo Uninstaller Free Publisher's site ↗ | Free + paid tiers | Windows | Removes an application and then hunts down the leftover files and registry keys Windows leaves behind. Use the free version for the occasional stubborn uninstall, not as a weekly cleaning ritual. |
Practical notes
- Check it the moment a machine feels slow or noisy.
- Act on the health status, not just raw numbers, if you are unsure.
- Keep a backup ready before a flagged drive fully dies.
Questions people ask
Is CrystalDiskInfo free?
Yes, open source and free to use.
What is S.M.A.R.T.?
The self-reporting data drives keep about their own health.
Will it save a dying drive?
No, but the warning gives you time to copy your files off.
Where it appears in our guides
- Setting up a new Windows PC: the order that actually works
- How to spot a bundled installer before it is too late
- Getting a few more years out of an older PC
- Do you need a third-party antivirus on Windows 11?
- Opening an archive safely: the extractor is part of your attack surface
See the full System & Hardware explainer for the other 7 programs in this category.
How to read this page. How to read this page. Platform, licence and publisher details come from our directory data. Where an independent review, audit or survey is mentioned, it is summarised in our own words with the source named and linked; our /sources page sets out that policy. The recommendation, the trade-offs and every 'skip it if' line are our editorial judgement. We do not run benchmarks, publish measured performance figures or host installers, and every download link goes to the publisher's own site. If a detail is out of date, our About page explains how to tell us.