HDD Health Monitor
Free HDD S.M.A.R.T. Health Monitor for Windows

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Low-level S.M.A.R.T. health monitor for ATA, USB (External, Enclosure), and NVMe drives on Windows.

HDD Health Monitor is a 100% free and open-source Windows utility that reads raw S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) data directly from your physical drives and presents it in a clean, easy-to-read interface.

S.M.A.R.T. is a built-in system found in almost every modern hard disk drive (HDD), solid-state drive (SSD), NVMe drive, and many USB-connected drives. It continuously collects dozens of internal measurements - such as read error rates, temperatures, reallocated sectors, and power-on hours - that can indicate whether a drive is healthy or starting to fail.

HDD Health Monitor makes all of this information visible to you at a glance, warns you before problems become data loss, and keeps a historical record so you can track changes over time.

Download HDD Health Monitor 1.1 (Portable)
Server	Download Link	Source Code
Mainpage	Download (1.4 MB)	Github Repo
Internet Archive	Download (1.4 MB)	-
Pixeldrain	Download (1.4 MB)	-

⚠️ Important Notes Before Running This Software

Before using it, please read the following important information carefully.

Safe and Clean Softwares

This program is completely safe, clean, and free from any viruses, malware, spyware, or harmful code.
It is designed to run directly without installation.

⚠️ Antivirus False Positive Warning

Some antivirus programs on Windows (including Windows Defender or third-party antivirus software) may incorrectly detect this program as a virus.

This is known as a false positive detection, and it can happen because: Read Here

Note:
For USB drives such as flash drives, memory cards, and eMMC drives, the S.M.A.R.T. data can be read properly by the program for original OEM products. However, for unofficial products, the program usually cannot read the S.M.A.R.T. data. In our experience, the S.M.A.R.T. data on unofficial drives is usually dummy data with unreasonable sizes and calculations. Follow the discussion below to learn how to buy a USB storage device safely and legally.
https://security.stackexchange.com/questions/276974/how-can-i-safely-buy-a-usb-memory-stick

Features

Per-drive health percentage and performance metric
Full S.M.A.R.T. attribute table (ID, value, worst, raw, status)
Temperature / health / failure critical alerts via tray notifications
Hot-plug aware - USB drives detected on arrival
Per-drive history graph (health % and individual attribute over time) <- HDD Only
Save-screenshot feature
Multi-drive tray icons

Compatibility

Windows 11, Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista (x64-bit Recommended)