DiskGenius Free Edition (Windows) – Simple GUI for "Verify or Repair Bad Sectors".

Disk Drill (Windows/Mac) – Excellent for recovering files from a drive that is already showing errors.

TestDisk (Cross-platform) – Command-line power tool for fixing partition tables and boot sectors. Can You Actually "Repair" a Bad Sector?

Finding "bad sectors" on your hard drive can be alarming, but modern software provides several ways to diagnose, isolate, and sometimes "repair" these issues before they lead to catastrophic data loss.

It is important to understand that a "bad sector" is a physical spot on the disk platter that can no longer store data. EEVbloghttps://www.eevblog.com HDD bad sector repair software? - EEVblog

Victoria HDD/SSD (Windows) – Professional-grade surface scanner used for low-level diagnostics and remapping.