Changing all files' extensions in a folder wit

问题:

How can I use the Windows command line to change the extensions of thousands of files to *****.jpg?

回答1:

You can use ren (as in rename):

ren *.XXX *.YYY

And of course, switch XXX and YYY for the appropriate extensions. It will change from XXX to YYY. If you want to change all extensions, just use the wildcard again:

ren *.* *.YYY

One way to make this work recursively is with the FOR command. It can be used with the /R option to recursively apply a command to matching files. For example:

for /R %x in (*.txt) do ren "%x" *.renamed

will change all .txt extensions to .renamed recursively, starting in the current directory. %x is the variable that holds the matched file names.

And, since you have thousands of files, make sure to wait until the cursor starts blinking again indicating that it's done working.

Note: this works only on cmd. Won't work on Powershell or Bash

回答2:

on CMD

type

ren *.* *.jpg

. will select all files, and rename to * (what ever name they have) plus extension to jpg

回答3:

Rename behavior is sometimes 'less than intuitive'; for example...

ren *.THM *.jpg will rename your THM files to have an extension of .jpg. eg: GEDC003.THM will be GEDC003.jpg

ren *.THM *b.jpg will rename your THM files to *.THMb.jpg. eg: GEDC004.THM will become GEDC004.THMb.jpg

ren *.THM *.b.jpg will rename your THM files to *.b.jpg eg: GEDC005.THM will become GEDC005.b.jpg

回答4:

NOTE: not for Windows

Using ren-1.0 the correct form is:

"ren *.*" "#2.jpg"

From man ren

The replacement pattern is another filename with embedded wildcard indexes, each of which consists of the character # followed by a digit from 1 to 9. In the new name of a matching file, the wildcard indexes are replaced by the actual characters that matched the referenced wildcards in the original filename.

and

Note that the shell normally expands the wildcards * and ?, which in the case of ren is undesirable. Thus, in most cases it is necessary to enclose the search pattern in quotes.

回答5:

thats simple

ren *.* *.jpg

try this in command prompt

回答6:

Rename multiple file extensions:

You want to change ringtone1.mp3, ringtone2.mp3 to ringtone1.wav, ringtone2.wav

Here is how to do that: I am in d drive on command prompt (CMD) so I use:

d:\>ren *.* *.wav 

This is just an example of file extensions, you can use any type of file extension like WAV, MP3, JPG, GIF, bmp, PDF, DOC, DOCX, TXT this depends on what your operating system.

And, since you have thousands of files, make sure to wait until the cursor starts blinking again indicating that it's done working.

回答7:

Just for people looking to do this in batch files, this code is working:

FOR /R "C:\Users\jonathan\Desktop\test" %%f IN (*.jpg) DO REN "%%f" *.png

In this example all files with .jpg extensions in the C:\Users\jonathan\Desktop\test directory are changed to *.png.

回答8:

For those of you guys who are not really good in programming you can check out this article on wiki how.
It shows many method of doing it that doesn't involve coding
and you can also check out this blogpost on changing file extensions.
It contains a console application that does all the stuffs for you.