IObit Smart Defrag

3.1 out of 5 stars 3.1 (362 votes)


Windows (All) / Freeware / 155,866 downloads

Disk fragmentation is generally main cause of slow and unstable computer performance. Smart Defrag helps defragment your hard drive most efficiently. Smart Defrag not only defragments computer deeply but optimizes disk performance. With "Install it and forget it" feature, Smart Defrag works automatically and quietly in the background on your PC, keeping your hard disk running at its speediest.

  • Homepage

    IObit Smart Defrag

  • Uninstaller


  • Latest Changes

    - Supported Windows 10 Technical Preview

    - Added display for Junk Files Clean results

    - Optimized SSD Trim feature for higher disk performance

    - Enhanced the stability of defragmentation

    - Optimized UI for easier operation

    - Updated multi-language

Reviews of IObit Smart Defrag

  1. 1 out of 5 stars

    Reviewing (May 6, 2015)

    Blocked by ESET & Mbam RE: Open Candy - You really can do better than this defragger~

  2. 4 out of 5 stars

    Reviewing (May 6, 2015)

    Are you sure it's 4.03.275 and not 725?

  3. 1 out of 5 stars

    Reviewing (Mar 12, 2015)

    don't mind the maggots

  4. 5 out of 5 stars

    Reviewing 4 Beta 1.0 (Jan 20, 2015)

    I love this it really works for me better than windows defrag

  5. 2 out of 5 stars

    Reviewing (Oct 23, 2014)

    Adds crap when installed & also adds 2 startup entries - You can do far better than this, mostly used by IOBIt to get you to try their other products.

Discuss IObit Smart Defrag

  1. Aug 24, 2011 - 3:40 AM

    This good tool runs only at WinNT or hiher, not on 9.x!