PowerToys is the way.

thank you!

This is the answer I would go with. I’ve used this utility for many many years, and for dozens of different needs. It’s a great Swiss-army-knife for renaming needs.

OP wants to rename some files not ants. Please read the post before responding thanks. I’m sure Ant Renamer’s great for entomological scenarios but this is a computer thing.

There's also a program free for personal use called Bulk Rename. It has an incredible amount of custom options that the Microsoft power toys couldn't do, that I needed. Just in case your program isn't super extensive on the options and possibilities, FOSS is preferred unless necessary

not working

I wouldn’t trust chatGPT on this. Sure, there’s a good chance it gets it right but also a non-negligible chance it gets it catastrophically wrong and you accidentally delete the files or rename them to something that’s even harder to fix.

Is this the new "just google it"?

To rename multiple file extensions to have no file extension, you can use a wildcard character to match all files with the current extension and then replace it with nothing (an empty string). Here's the command you can use in Command Prompt or PowerShell:

For Command Prompt:

ren *.(current extension name) *.

For PowerShell:

Get-ChildItem *.(current extension name) | Rename-Item -NewName { $_.Name -replace '.(current extension name)$', '' }

Replace "(current extension name)" with the actual extension you want to remove, and this command will remove the extension from all matching files

Idk if it's accurate but that was it's response to OPs input

No, that doesn't work, you have to pass the suffix you want to remove to basename:

$ touch test.txt
$ basename test.txt
test.txt
$ basename test.txt .txt
test

newfile=$(echo $file|sed ‘s/..*//‘)

there are more than 300 files in multiple folders that I need to remove the file.extension, doing it 300 times is a tad difficult.

How to batch rename extensions. Navigate to the folder containing the files you want. Once there, launch command prompt from the folder menu by holding down shift and right clicking on an empty space. Once in command prompt, tiny fishing you can now use the “ren” (for rename) command to rename for example,