Dear Kannan

 please have a look at the link.

Good luck

http://file.downloadatoz.com/uxd-file-extension/uxd-converter.html

Dear Kannan, 

I can definitely recommend a universal file conversion tool for the XRD files: PowDLL available at: (free)

http://users.uoi.gr/nkourkou/powdll/

it's free and offer conversion between many different file types used in XRD.

Best regards,

Sebastian

Dear Kannan,

UXD files are generally text files, so even without PowDLL (that I also recommand by the way) you should be able to read them with excel, with the notepad, and possibly with many XRD softwares that will accept xy data.

Now if your questions deals with free softwares dedicated to analysis of XRD data, you can try different softwares (that may accept your UXD data with minimal pre-treatment):

From the university of Barcelona, a bundle of software for different analyses:

http://departments.icmab.es/crystallography/software/form/6

for Rietveld analysis:

- MAUD (http://maud.radiographema.eu/)

-Fullprof (https://www.ill.eu/sites/fullprof/)

-Profex (http://profex.doebelin.org/)

@Laurent Gremillard,

I open UXD file with MAUD software. It opens without any difficulty.  Thank you very much.