Higher File Access Speed
Disk fragmentation is generally the main cause of slow and unstable computer performance. In order to accelerate your hard drive for faster data access and outstanding disk performance, Smart Defrag 5 provides efficient defragmentation technology to hard drives and SSD using multi-threading defragging whilst also consolidating free space and defragging large files. Then you can enjoy faster game launching speed, copy files in half the time, etc.
Up to 100% Faster PC Startup
Specific boot files in the system disk are not allowed to be moved safely while Windows is running, which causes a slower and slower system startup. The Boot-time Defrag feature of Smart Defrag 5 will easily do this job for you, it can help you safely defrag files on HDD. Furthermore, using a feature unique to IObit, it allows you to customize defrag specified files during system boost. After that you can enjoy a faster PC startup and top running speed on your PC with the most stability.
Safe & Automatic Disk Defrag
Smart Defrag 5 not only provides disk defragmentation as any other tool does, but also optimizes it by intelligently streamlining your files based on using frequency. With IObit latest disk defrag engine, it is just as safe for your files as using Windows. And you just need to install & forget it. Smart Defrag 5 will automatically work for you with no data lost.

Media Review

"IObit Smart Defrag is the best defragger we've tried yet."

"IObit Smart Defrag optimizes your PC to take full advantage of SSD performance while defragmenting your hard disks. Its SSD Trim tool automatically enables system tweaks that typically require experience to apply. Smart Defrag's updates include a new defrag engine, specialized Game Defrag, a cool new look, and many more language options (35 and counting)."-Cnet

User Review

"Having My "Smart Defrag 5 Pro" set to auto defrag, and running a "Defrag and Optimize" once a week, keeps my system running smooth and well."

"I have been using Iobit products for a good many years now. Because I am running an older machine with 6 drives, including 2 external, I find that Iobit's "Smart Defrag 5 Pro" has served me very well. Being an older machine,, my computer system tends to become fragmented quite easily. Having My "Smart Defrag 5 Pro" set to auto defrag, and running a "Defrag and Optimize" once a week, keeps my system running smooth and well. Iobit is constantly upgrading and striving to make the product even better as time goes by. I am well pleased with this product."

"It is easy to use, must have utility, for your hard disc or SSD."

"I run a combination of RAID 0 SSDs and RAID 0 HDDs and use Smart Defrag Pro to analyse, defrag and keep my drives running at peak performance. As with all IObit software it is easy to install, use and very reliable. Just set it up and forget it. Smart Defrag has a very small memory foot print so it won't slow down your system. Definitely recommended!"

"With Smart Defrag a more robust and accurate diagnosis than Windows 10 Optimiser"

"I use Smart Defrag since its creation on several PCs and from the beginning with the members of my computer club we were able to see the continuous improvements. It was perfect for them, except the English language. So I invested for IObit in the French translation. From now on, the French IT magazines strongly recommend Smart Defrag, including with Windows 10 Optimiser, for a more robust and accurate diagnosis with options to speed up the system startup."

"Smart Defrag v5 is a great asset to my system, and it does everything I need and want it to do."

"I don't know how I could be more satisfied with Smart Defrag v5. It works like a charm everytime, and all I have to do is run the program and everything is clean and I'm absolutely 100% satisfied, not only with the program, but also with the quick reply when I needed advice on how to manage the problems I might have had. That I appreciate very much."
  • William Howes
    2016
  • Edward Lee Ah Yen
    2014
  • Roland LALIS
    2016
  • Jim Parten
    2016

Over 7,000,000 User's Choice

Maximum Hard Drive Performance & Higher Data Access Speed

Free Download

V 5.4.0 | 12.7 MB
Supports Windows XP/Vista/7/8/8.1/10
"IObit Smart Defrag is the best defragger we've tried yet."
Free Download
Europe
Deutschland
España
France
Italia
Nederland
Sverige
United Kingdom
North America
Canada
México
United States
South America
Argentina
Brasil
Chile
Asia&Pacific
Australia
New Zealand