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XP lets you rename files in bulk by simply selecting multiple files within Windows Explorer and pressing the F2 key. When you use this feature, the OS applies the name you enter to the first file and applies the same name with a number in parentheses to the other files you selected (the file extensions remain unchanged).

For example, if you select the following files,

  • notes.doc
  • figures.xls
  • disney.jpg
  • holiday.gif

and rename the first file (notes.doc) to SoD.doc, XP renames the remaining files as follows:

  • SoD (1).xls
  • SoD (2).jpg
  • SoD (3).gif

How do I change the extension of these multiple files at once.

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4  
C:\folder\> ren *.* *.newextension? –  Ƭᴇcʜιᴇ007 Dec 1 '11 at 20:17
    
@ techie007 : Great..Its working. Thank you. –  ahmed Dec 5 '11 at 19:18
    
It was more of a question than a suggestion. ;) I'll stick it in as an answer. –  Ƭᴇcʜιᴇ007 Dec 6 '11 at 0:00

3 Answers 3

up vote 6 down vote accepted

You could use the command line interface and use the rename function:

C:\folder\> ren *.* *.newextension

This will rename everything to ".newextension".

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I don't know if it's possible natively but for my needs, I use a tool called Bulk Rename Utility, I know it seems like an overkill (not to mention the UI) at first but it's worth it :

Bulk Rename Utility main windows

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4  
Whoever "designed" that interface should be taken out into the public square and flogged. –  Patrick S. Dec 6 '11 at 1:20

You could use Massive File Renamer

It will allow you to easily rename multiple file extensions. It's very fast and simple!

See it in action:

enter image description here

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