About Smart Defrag
Smart Defrag guarantees you maximum Hard Drive performance highest data access speed.
Smart Defrag is a reliable, powerful, and user-friendly disk optimizer to enhance hard drive performance. It intelligently organizes your files based on how often they are accessed, thus speeding up data retrieval and extending the lifespan of your drive, whether it's an HDD or an SSD. This capability distinguishes it from other disk optimization tools that only offer basic defragmentation.
Smart HDD Defrag
With its advanced IObit disk defrag engine, Smart Defrag significantly improves the reading and writing speed of HDDs, enhancing access speed and overall performance. This makes the process of optimizing HDDs simple and efficient.
Intelligent SSD Trim
As SSDs gain popularity in the computing world, maintaining them is essential. Smart Defrag utilizes industry-leading technology for SSD trimming, aiming to extend their lifespan.
Automatic Disk Optimization
With Auto Defrag and Scheduled Defrag, you can ensure that your drives are consistently running at peak efficiency without having to start the optimization process manually.
Boot Time Defrag
Some fragments cannot be defragmented while the computer is running. Boot Time Defrag addresses this issue by cleaning up the Windows registries and files scattered across the disk immediately as the system boots up. This helps free up more RAM and maintain system stability.
Better Gaming Experience
Monitor Disk Status
What's new:
+ Enhanced compatibility to deliver more stable and efficient defragmentation
+ Updated language files
+ Fixed known bugs
Previous Versions
Here you can find the changelog of Smart Defrag since it was posted on our website on 2015-04-27 03:00:00.
The latest version is 11.3.0.476 and it was updated on 2026-06-13 14:11:28. See below the changes in each version.
Smart Defrag version 11.3.0.476
Updated At: 2026-04-10
Changes: + Enhanced compatibility to deliver more stable and efficient defragmentation
+ Updated language files
+ Fixed known bugs
Smart Defrag version 11.2.0.472
Updated At: 2026-01-06
Changes: + More accurate detection of disk types
+ Optimized Smart Analyze to analyze more intelligently, delivering more precise results
+ Improved defragment engine to boost defragment performance
+ Fixed bugs
Smart Defrag version 11.1.0.466
Updated At: 2025-10-21
Changes: + Enhanced Large File Defrag to better defragment large files for faster disk read/write speeds and longer disk life
+ Improved Disk Health to display the data more accurately
+ Optimized defrag strategy to reduce resource usage
+ Fixed known bug
Smart Defrag version 11.0.0.454
Updated At: 2025-07-30
Changes: + More intelligent technology to apply the most proper defrag optimization methods for different disks to achieve the best performance
+ Improved file defrag algorithm for faster access
+ Optimized Free Space Defrag by consolidating large blocks of continuous free space to maximize disk read
Smart Defrag version 10.4.0.441
Updated At: 2025-05-08
Changes: + Smarter algorithm intelligently applies the most appropriate defrag method for different disks to achieve optimal performance
+ Enhanced Disk Cleanup to free up more disk space
+ Optimized Boot Time Defrag for faster startup
+ Fixed known bugs
Smart Defrag version 10.3.0.435
Updated At: 2025-01-14
Changes: + Optimized the logic of Large File Defrag to speed up disk read/write and enhance disk durability
+ Optimized Auto Analyze for smarter analysis and more accurate results
+ New Lucky Draw to win Smart Defrag Pro codes and IObit product discounts
+ Fixed minor bugs
Smart Defrag version 10.2.0.435
Updated At: 2024-11-29
Changes: + Enhanced defrag engine for ultra-fast, stable, and efficient defragmentation
+ Optimized Boot Time Defrag for faster startup
+ More accurate detection of disk types
+ Fixed minor bugs
Smart Defrag version 10.1.0.419
Updated At: 2024-09-10
Changes: + Enhanced Large File Defrag to better defragment large files for faster disk read/write speeds and longer disk life
+ Improved Disk Health to display the data more accurately
+ Optimized defrag strategy to reduce resource usage
+ Fixed known bugs
Smart Defrag version 10.0.0.374
Updated At: 2024-07-23
Changes: + Optimized Smart Defrag and file prioritization for faster file access
+ Enhanced Large File Defrag to better defrag large files for faster disk read/write speed and longer disk life
+ More user-friendly installation process
Smart Defrag version 9.4.0.342
Updated At: 2024-04-09
Changes: + Enhanced compatibility for more stable and efficient defragmentation
+ Optimized Boot Time Defrag to speed up system startup
+ Strengthened the recognition of SSD
+ Fixed minor bugs
Disclaimer
External Download
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