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Ability to batch rename files in lower and upper case?


It is easy to rename files in batches using a script or command prompt in lower and / or upper-case letters on Windows 11, 10, ... and MS Server OS!



Everyone is looking for or needs at some point a way to rename all files in folders and subfolders in lower case or upper case, luckily this is not an impossible task under Windows 11, 10, .... and MS Server OS!  


Contents:

1.) ... Use the command prompt to convert all files to lower case
2.) ... Effective PowerShell examples to rename to lower  and / or upper case!
3.) ... Example in Explorer from the address bar!
4.) ... Pros and Cons of Converting Files to Lowercase Using Command Prompt!



1.) Convert all files to lower case at the command prompt  

To recursively with subfolders use the / r  parameter with  the dir command :   dir /r/l/b/a-d "%f"

 
cmd /k for /f "Tokens=*" %f in ('dir /l/b/a-d') do (rename "%f" "%f")

2.) Effective PowerShell examples to rename in lower and / or upper case letters!


The PowerShell command to convert files to upper case and the file extension to lower case! 


Dir | Rename-Item -NewName {$_.BaseName.ToUpper() + $_.Extension.ToLower()}



The PowerShell command to convert files to lower case and the file extension to upper case! 


Dir | Rename-Item -NewName {$_.BaseName.ToLower() + $_.Extension.ToUpper()}



The PowerShell command to completely rename files in capitalization!
  


Dir | Rename-Item -NewName {$_.BaseName.ToUpper() + $_.Extension.ToUpper()}

3.) Example in Explorer from the address bar!


Example in Quad Explorer from the address bar with additional recurses to include all subfolders!

( ... see Image-1 Point 1 )

You can also use the address bar in MS Windows Explorer!

(Image-1) Stacks of files in upper and lower case over the address line!
Stacks of files in upper and lower case over the address line!

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▲ Back to the top ▲


4.) Pros and Cons of Converting Files to Lowercase Using Command Prompt!

Converting files to lowercase using Command Prompt has both advantages and disadvantages.

Pros:


- Efficiency: Converting files to lowercase using Command Prompt can be very efficient, especially if you have a lot of files to convert.

- Flexibility: Command Prompt gives you great flexibility when converting files. For example, you can use regular expressions to rename files based on specific criteria.

Cons:



- Complexity: Converting files to lowercase using Command Prompt can be complex if you are not familiar with regular expressions.
- Error prone: Converting files to lowercase using Command Prompt can be error prone if you make a mistake in the command.


Converting files to lowercase using Command Prompt is a good option if you have a lot of files to convert and need flexibility and efficiency. However, if you are not familiar with regular expressions or want to avoid errors, you should use another method.


Here are some tips to make converting files to lowercase using Command Prompt safer:

- Use a test folder to test the conversion before performing it on your production system.

- Use a backup plan to back up your files before conversion.

- Carefully check the output of the command to ensure that the files were converted correctly.



FAQ 107: Updated on: 9 November 2023 21:23 Windows
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It is easy to list hidden files via the command prompt in Windows 11, 10, 1. Show hidden files with the command prompt 2. Show hidden files
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Activate the classic boot menu under Windows 11, 10, 8.1, ... again!


The classic boot menu / boot load of Windows can easily be reactivated to start better in safe mode or with repair options 1. Activating the classic

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Keywords: windows, 11, 10, console, ability, batch, rename, files, lower, upper, case, script, command, prompt, letters, Questions, Answers, Software




  

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