A powerful and simple disk defragmentation system tool for Windows

UltraDefrag (64-bit)

UltraDefrag (64-bit)

  -  3.43 MB  -  Open Source
  • Latest Version

    UltraDefrag 7.1.4 (64-bit) LATEST

  • Review by

    Michael Reynolds

  • Operating System

    Windows XP64 / Vista64 / Windows 7 64 / Windows 8 64 / Windows 10 64 / Windows 11

  • User Rating

    Click to vote
  • Author / Product

    UltraDefrag Development Team / External Link

  • Filename


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UltraDefrag 64-bit is a powerful Open Source Defragmentation Tool for Windows Platform. It can defragment any system files including registry hives and paging files. Also one of the main goals of UltraDefrag is doing the job as fast and reliable as possible.

When files consist of many little fragments scattered around the disk the computer needs more mechanical work to read them. Because of that, the disk access becomes slower.

The app reduces the file fragmentation, thus it makes disk operations faster. Also, the program can optimize a whole disk by placing small files close to each other, sorted by path (or other criteria). After the disk optimization less mechanical work is needed to read groups of small files. This reduces startup times of many applications including web and photo browsers.

In contrast with the most other disk defragmenters, the tool can defragment locked files by running during the Windows boot. Actually all files including page and hibernation files can be defragmented there. Also, Ultra Defrag 64-bit aims to be fast, simple, reliable, and efficient.


UltraDefrag is a powerful open-source disk defragmentation utility designed to improve the performance and efficiency of your computer's storage devices. Disk fragmentation occurs when files are broken into smaller pieces scattered across your hard drive, leading to slower access times and decreased overall system performance. It aims to combat this issue by reorganizing fragmented files and optimizing disk usage, resulting in faster load times and smoother system operation.

Key Features

Experience a Speedier Computer:
It offers the remarkable capability to reassemble fragmented files residing on your disks, resulting in a notably faster computer. This performance boost extends across various aspects of your system, enhancing the speed of your operating system, applications, and games. You'll notice swifter computer startup and shutdown times, accelerated web browsing, improved gaming FPS, and more responsive desktop applications.

User-Friendly Graphical Interface:
It boasts an intuitive graphical interface that simplifies the entire process. With just a few clicks, you can achieve your goals effortlessly, eliminating the need for any coding or technical expertise.

Efficient File and Folder Defragmentation:
Should you prefer to defragment specific files and folders instead of the entire disk, it has you covered. Easily select the files and folders you wish to optimize within Windows Explorer, right-click, and choose the "Defragment with UltraDefrag" option to swiftly enhance their performance.

Optimal Handling of NTFS Metafiles and Data Streams:
The app recognizes the vital role played by NTFS metafiles and data streams within the file system. By defragmenting these components during disk optimization, the software ensures your file system consistently operates at peak performance levels.

Streamlined Defragmentation of Locked Files:
Occasionally, Windows and applications lock files, preventing their efficient defragmentation. Certain locked files can significantly impact system performance, particularly page, swap, and hibernation files. It operates in a specialized mode during Windows boot to defragment all locked files. This feature allows you to effortlessly defragment these files with just a few clicks.

Comprehensive Disk Optimization:
In addition to regular defragmentation, the tool offers comprehensive disk optimization. During this process, all files and folders are strategically relocated to the fastest disk tracks and organized for maximum efficiency. Moreover, free space is defragmented to minimize future file and folder fragmentation.

Automated Defragmentation:
With the tool, you can configure automatic disk defragmentation with just a couple of clicks, ensuring your disks remain fully optimized at all times. By default, automatic defragmentation occurs when your computer is idle. However, you can easily customize a specific schedule to suit your preferences.

Effortless Configuration:
It simplifies the configuration process with its user-friendly preferences dialog. No more editing scripts; everything can be adjusted with just a few clicks. Even inexperienced users can achieve optimal disk performance without the need for extensive tweaking, thanks to sensible default settings.

Automated Sleep, Hibernation, or Shutdown:
You can conveniently instruct the software to put your computer to sleep, hibernate, or shut it down upon completion of the task. This feature ensures that your computer remains secure and powered down once the defragmentation process is finished.

Robust Command Line Interface:
It comes equipped with a powerful command line interface, allowing for full automation of complex defragmentation tasks.

Portable Edition for On-the-Go Usage:
For added convenience, it offers a user-friendly portable edition that can be loaded onto a USB stick for use without the need for installation.

Reliable and Secure Operation:
Thanks to extensive testing and adherence to standard Windows API protocols, the app is exceptionally reliable and entirely safe to use. Rest assured, it will never compromise the integrity of your files during the defragmentation process.

What`s new

UltraDefrag 11 has been released (Apr 2, 2023)
UltraDefrag 11 features temporary files removal before defragmentation, brand new interface for individual files and folders defragmentation, files search in file fragmentation reports, detected disk types correction, a bunch of optimizations and other improvements.

UltraDefrag 10 has been released (June 12, 2022)
UltraDefrag 10 features full support of solid state drives (SSD), full compatibility with Windows 11 and the latest Windows 10 updates, faster disk processing algorithms, streamlined file fragmentation reports, completely rewritten documentation and a bunch of other improvements.

UltraDefrag 9 has been released (Sep 21, 2019)
UltraDefrag 9 features an easy to use preferences dialog, a convenient menu for launching the boot time defragmentation, speed optimizations and a bunch of other improvements.

UltraDefrag 8 has been released (Sep 28, 2018)
UltraDefrag 8 features automatic defragmentation, deep optimization of disks, simplified installation, speed optimizations and a bunch of other improvements.

How to Use

Launch the Program: After installation, open the program from your Start menu or desktop shortcut.

Select Drives: On the main screen, you'll see a list of your drives. Choose the one you want to defragment.

Choose Defragmentation Method: Click on the "Action" menu and select your preferred defragmentation method (e.g., Quick Optimization, Full Optimization).

Start Defragmentation: Click the "Start" button, and the app will begin optimizing your selected drive. You can monitor the progress in real-time.

Boot-Time Defragmentation: To optimize system files and locked files, enable boot-time defragmentation by going to "Settings" > "Boot-time scan" > "Enabled." This will prompt you to restart your computer to complete the process.


Is UltraDefrag safe to use on SSDs?
Yes, the program is safe for SSDs. It includes optimization algorithms designed specifically for solid-state drives, which help maintain their performance and lifespan.

Does UltraDefrag work on Windows 10 and Windows 11?
Yes, the latest app is compatible with both Windows 10 and Windows 11, as well as previous versions of Windows.

How often should I run UltraDefrag?
It's recommended to run the app regularly to prevent excessive fragmentation. Setting up a weekly or monthly schedule is a good practice.

Can I defragment specific files or folders?
It primarily focuses on disk defragmentation rather than individual files or folders. However, optimizing your entire drive will indirectly improve the access times for all files.

Is UltraDefrag open-source software?
Yes, the app is open-source, which means it's freely available and you can inspect its source code.

Ready to boost your computer performance with UltraDefrag 11?

Standard Plan - €19.99

All features included
24/7 technical support
Free maintenance updates
Lifetime license for use on up to 3 computers

Enterprise - €39.99

All features included
24/7 technical support
Free maintenance updates
Lifetime license for use on unlimited number of computers


O&O Defrag Pro: Optimize your HDD and you can experience speed increases of up to 100%.

IObit Smart Defrag: Known for its automatic background defragmentation, this tool is user-friendly and offers both basic and advanced defragmentation options.

Defraggler: Developed by CCleaner, Defraggler offers similar functionality with a user-friendly interface. It also allows for file-specific defragmentation.

Windows Built-in Defragmenter: Windows includes its own disk defragmentation tool. While it may not be as feature-rich as third-party options, it's a simple and functional choice for basic defragmentation needs.

  • Open-source and free to use.
  • Offers various defragmentation methods.
  • Supports SSD optimization.
  • User-friendly interface.
  • Boot-time defragmentation for locked files.
  • Lightweight and resource-efficient.
  • Lacks advanced features like file-specific defragmentation.

UltraDefrag is an excellent choice for Windows users looking to enhance their system's performance by addressing disk fragmentation. With its user-friendly interface, versatile defragmentation methods, and support for SSD optimization, it provides a comprehensive solution for optimizing your storage devices.

The fact that it's open-source and completely free further adds to its appeal. While it may lack some advanced features found in premium alternatives, UltraDefrag remains a reliable and efficient tool for keeping your SSD/HDD disks in TOP shape!

Also Available: UltraDefrag (32-bit) and UltraDefrag Portable

  • UltraDefrag 7.1.4 (64-bit) Screenshots

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    UltraDefrag 7.1.4 (64-bit) Screenshot 1
  • UltraDefrag 7.1.4 (64-bit) Screenshot 2
  • UltraDefrag 7.1.4 (64-bit) Screenshot 3