UltraDefrag

Increase your system performance with this easy to use tool

Please note, here you can find the latest open source release of UltraDefrag (7.1.4). The most recent UltraDefrag release (12.0.0) can be found on our official website: https://ultradefrag.net

UltraDefrag is a disk defragmenter for Windows, which supports defragmentation of locked system files by running during the boot process. It is easy to use without any complicated scripting or a huge load of configuration settings. You can filter the files processed by size, number of fragments, file name and path. You can terminate the process early by specifying an execution time limit.

Features

Automatic defragmentation of disks
Automatic disks cleanup before defragmentation
Graphical user interface to follow the process visually
Boot time defragmentation for system files processing
Console interface for batch processing or setting up scheduled tasks
Process single files, folders or drives from the Explorer's context menu
Specialized processing algorithms for each situation
Available for both 32bit and 64bit Windows
Optional quick test mode to get a preview of the resulting disk usage

Project Samples

File fragmentation report - light color theme

File fragmentation report - dark color theme

Project Activity

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User Reviews

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cannedz Posted 2022-06-08

Thanks to the developers of UltraDefrag for this excellent program. My Windows 7 (32-bit) was getting very slow due to a badly fragmented MFT from years of use, meaning opening simple file/dir scanning programs like Irfan could take up to 10 seconds while they accessed the MFT. UltraDefrag fixed this problem perfectly, even allowing me to continue using the computer while it did its work (which impressed me) NOTE! if you still use 32-bit Windows 7 like me, then you might find (as I did) that the i386 package is missing vital exe files. Google "UltraDefrag old 32-bit versions" to find an older version that will work (I used version 7.0.2, dated 2016, which I downloaded from fosshub.com then virus-checked its exe and dll files at Virustotal)
crackez Posted 2020-11-09

I did the first Greek translation of this project, then add some other stuff and after a while I see 2 other "Greek" translators who translate like 1-2 words basically saying "we did it" ..I was mad but nothing happened, they got my credits ...then I see it turns into commercial product, right ...it was suppose to be open source not turn it into profit, I didn't sign for this
jmd89 Edited 2021-11-05

The program starts a new analysis every time you want to defrag even though you just ran one before. The developer updated the version 7 here just to add ads for their paid version 9. The ads pop up everywhere and makes it a hassle to use. Overall I don't feel safe keeping this on my computer.
kbr61 Edited 2020-05-04

1 - It seems to be good. I tried it years ago, several times (off-&-on) through various operating systems, yet, STILL -- they can't get it to shut-down your computer, when done defragging! WHYYY would I want to buy that problem? 2 - Plus, why is the g.u.i. sooo small? I have to wear/use my reading-glasses, to see it (read the button pop-ups). Perhaps they could increase the over-all size? 3 - Also, i've begun replacing my h.d.d units, with s.s.d.'s (which we're NOT supposed to de-frag) sooo -- wht now? What's to become of this software? SOME-ONE, please advise? thanks much! kbr
pahoo Edited 2020-04-17

I had used Ultradefrag for many years and just decided to purchase the 9.0 64bit Standard version. I have had NO tech support in response to an installation error. I had 7 days to resolve it before the time-out period expired. It expires tomorrow. It was supposed to have been an AMD64 version but it is not. Nowhere can I find even a 32 bit version of 9.0! It appears that EVERYONE these days has gone down the tubes! I'll suck up my $$ loss but never again. The 'aspects' rating have no meaning. They had been excellent. UPDATE: I already had this last year. Only the About menu choice is updated to show 9.01 in the popup. The files are pre-existing, a year old.