Changing all files extensions in a folder with one command on Windows

Question

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

User · Answer

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   gt 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

User · Answer

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

User · Answer

In my case I had a directory with 800  files ending with  StoredProcedure sql  they were scripted with SSMS    The solutions posted above didn t work  But I came up with this    Based on answers to batch programming - get relative path of file    echo off setlocal enabledelayedexpansion for   f in     do     set B   f   set B  B  CD       ren   B     B  StoredProcedure        The above script removes the substring  StoredProcedure from the filename  I m sure it can be adapted to cover more cases  ask for input and be overall more generic

User · Answer

I know this is so old  but i ve landed on it   and the provided answers didn t works for me on powershell  so after searching found this solution  to do it in powershell  Get-ChildItem -Path C  Demo -Filter   txt   Rename-Item -NewName   System IO Path   ChangeExtension    Name    old      credit goes to http   powershell-guru com powershell-tip-108-bulk-rename-extensions-of-files

User · Answer

on CMD   type  ren       jpg     will select all files  and rename to    what ever name they have  plus extension to jpg

User · Answer

thats simple  ren       jpg   try this in command prompt

User · Answer

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

User · Answer

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

User · Answer

An alternative way to rename files using the renamer npm package   below is an example of renaming files extensions  renamer -d --path-element ext --find ts --replace js

User · Answer

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

User · Answer

What worked for me is this one cd to the folder first    Get-ChildItem -Filter   old   Rename-Item -NewName   System IO Path   ChangeExtension    Name    new

[windows] Changing all files' extensions in a folder with one command on Windows

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