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HDD Health Monitor
What it is
HDD Health Monitor reads raw S.M.A.R.T. data from physical drives and presents health information, estimated performance, warnings, and history. It displays per-drive health and performance percentages alongside a full S.M.A.R.T. attribute table. The Windows utility scans physical drives automatically and can monitor multiple drives, with a separate tray icon and alerts for each. Notifications cover temperature, declining health, predictive failure, reallocated sectors, uncorrectable errors, and NVMe critical warnings. While running, it records health and selected attribute snapshots every five seconds and saves history between sessions. Supported drive types include ATA/SATA, M.2 SATA, NVMe, USB, and SCSI, though available information depends on the drive and controller. The standalone executable needs no installer or dependencies, but administrator privileges are required to read S.M.A.R.T. data. It supports Windows versions from Vista through Windows 11. The software is free and open-source under the MIT License, does not expire, and requires no registration. It can also save a PNG of the main window to a folder in Documents.
For and against
For
- Monitors multiple drives with separate tray alerts.
- Saves health history between sessions.
- Free, open-source, and does not expire.
- Runs as a standalone executable without dependencies.
Against
- Administrator privileges are required for S.M.A.R.T. data.
- Available data depends on the drive and controller.
- Some USB enclosures may not pass through S.M.A.R.T. data.
- Maker warns antivirus products may incorrectly flag it.
The verdict
HDD Health Monitor offers drive status, alerts, and history in a free Windows utility. Read access depends on administrator privileges and on the drive-controller combination exposing S.M.A.R.T. data.
Who it suits
It suits Windows users who want local drive-health monitoring, alerts, and saved S.M.A.R.T. history. It may be useful for people managing several physical drives at once.
Plans and prices
HDD Health Monitor
100% free · open-source · Windows utility
Read 3 Oct 2026 · hddmonitor.github.io
On the record
- Alerts
- Windows tray notifications cover temperature, declining health, S.M.A.R.T. predictive failure, reallocated sectors, uncorrectable errors, and NVMe critical warnings.hddmonitor.github.io · read 3 Oct 2026
- Drive monitoring
- Scans all physical drives automatically and monitors multiple drives simultaneously, with a separate tray icon and alerts for each.hddmonitor.github.io · read 3 Oct 2026
- Drive support
- Supports ATA/SATA, M.2 SATA, NVMe, USB drives, and SCSI drives, though available data depends on the drive and its controller.hddmonitor.github.io · read 3 Oct 2026
- Health and performance
- Shows per-drive health and estimated performance percentages alongside a full S.M.A.R.T. attribute table.hddmonitor.github.io · read 3 Oct 2026
- History
- Records health and selectable S.M.A.R.T. attribute snapshots every five seconds while running and saves history to disk between sessions.hddmonitor.github.io · read 3 Oct 2026
- Hot-plug
- Detects connected USB drives in about one to two seconds and removes their drive selector and tray icon when unplugged.hddmonitor.github.io · read 3 Oct 2026
- License and expiration
- The documentation says the software is free and open-source under the MIT License, does not expire, and requires no registration.hddmonitor.github.io · read 3 Oct 2026
- Portable setup
- Runs as a standalone executable without an installer or dependencies; administrator privileges are required to read S.M.A.R.T. data.hddmonitor.github.io · read 3 Oct 2026
- Purpose
- Reads raw S.M.A.R.T. data from physical drives and presents drive health information, warnings, and historical trends.hddmonitor.github.io · read 3 Oct 2026
- Screenshots
- Can save a PNG image of the main window to a HDDH_Screenshots subfolder in Documents.hddmonitor.github.io · read 3 Oct 2026
- Security note
- The maker warns that some Windows antivirus products may incorrectly flag the program as malware.hddmonitor.github.io · read 3 Oct 2026
- Support
- The site provides documentation, bug reporting, and an email contact at [email protected].hddmonitor.github.io · read 3 Oct 2026
- USB flash limitation
- The maker says S.M.A.R.T. data usually cannot be read from unofficial USB flash drives, memory cards, and eMMC products.hddmonitor.github.io · read 3 Oct 2026
- USB limitation
- S.M.A.R.T. data may be unavailable when a USB enclosure bridge does not support pass-through or a supported protocol.hddmonitor.github.io · read 3 Oct 2026
