# How to change extension of multiple files from command line?

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by

tommyk

Last Updated June 07, 2017 12:02 PM

I have many files with .abc extension and want to change them to .edefg
How to do this from command line ?

EDIT: I have a root folder with many sub-folders, so the solution should work -r recursively.

#### Answers 6

This will do the required task if all the files are in the same folder

rename 's/.abc$/.edefg/' *.abc To rename the files recursively use this: find /path/to/root/folder -type f -name '*.abc' -print0 | xargs -0 rename 's/.abc$/.edefg/'

Chakra
April 19, 2011 12:23 PM

A portable way (which will work on any POSIX compliant system):

find /the/path -depth -name "*.abc" -exec sh -c 'mv "$1" "${1%.abc}.edefg"' _ {} \;

In bash4, you can use globstar to get recursive globs (**):

shopt -s globstar for file in /the/path/**/*.abc; do mv "$file" "${file%.abc}.edefg" done

The (perl) rename command in ubuntu can rename files using perl regular expression...

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Command line users may find it helpful to change and rename the file extension of a group of files in a directory. For example, let’s say you have a batch of files with the file extension “.txt” but you want all of those the file extensions to be “.py” instead. That’s what we’re going to demonstrate here by relying on simple bash scripting to change a group of file extensions at the command line of Mac OS / OS X, but this will also work in linux and other unix flavors too.

Before beginning, realize this is not changing a file type, it is only changing the file extension. Additionally, this walkthrough approach is intentionally using the command line and is thus aimed at more advanced users. However, the Terminal is not the only way to do this, and so if this is too advanced or irrelevant to your user skill set then recall that Mac OS offers simple tools to both batch rename files in Mac OS and batch change file extensions in the Finder as well, neither of which...

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We can use the built-in command line utility rename to change the name or extension of a file. Note that this command is just to rename a file keeping it in the same folder and can’t be used to move to another folder. See below rename command’s syntax explained with examples.

Syntax of rename command:

rename file_path new_name

Example:

rename d:\data\file1.doc file2.doc

After executing the above command we’ll have file2.doc in the folder d:\data

#### Change file extensions in bulk using rename command

We can change the extension of a set of files in one step using rename command. For example, you have set of files with extension .html and you want to rename them to .txt. You can do this with the below command

rename *.html *.txt

Rename command works in all Windows versions – XP, Vista and Windows 7.

#### Errors:

If the files is being used by a program, then rename command fails with below error.C:\>rename data.xlsx newdata.xlsx The process...
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(for Windows OS only)

A clumsy virus might change the extension of all your files to a particular extension.
e.g. all your ‘.abc’ files may be changed to ‘.xyz’. So if you’d wish to open files you’ll have to correct the extensions. If there are a few files to be corrected, you can easily do it manually. But what if there are 50 or 100 or 1000 files to look after? One would obviously not consider changing all their extensions one by one.

I faced the same problem today when my cousin rushed to me with a flash drive: “I’ve got all my photos renamed to something. c’mon, you’re a computer engineer”.

I mumbled: “Is that what a computer engineer supposed to do.?!”

“let me try”, I said.

I saw that all his photos were changed to some .chk extension. There were around 800 files. And he sat next to my lappi trying to rename them all one by one while i was thinking about a way out of it. And yeah if it can be done(renamed) with the command line, the...

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.jpg to .png, .chk to .jpg, .jpg to .avi, .divx to .avi, etc. These are some of the file extensions you want to change for your files. Especially if you have plenty of files to rename or change their extension. It's a waste of time to change the extension of 200 files one by one. You can save time by following this one simple method.

(Note: This is applicable to Windows OS only)
Change File Extensions of Multiple Files Thru Command Line

To rename or change file extension of multiple files, you must put those files in one folder. Point the folder with the mouse, press shift and right-click on that folder, and choose Open command window here.

The Command Window will open (like you can see in the screenshot below). Type the following command line:

ren *.(current file extension name) *.(file extension you want)

Take note: Don't forget to provide space between ren and *.jpg. Then, space between *.jpg and *.png

For example if you want...

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AVS Image Converter supports the command line mode, therefore allowing you to automate the processing of your images. This opportunity can be indispensable in case you have to constantly work with a large number of different files.

For example, you can automatically complete the following routine tasks:

convert a series of images into popular formats, create animated GIF or PNG images, resize a set of photos using ready-made presets, add a text or image watermark to a bunch of pictures, correct digital photos adjusting their brightness, contrast etc. apply effects, such as Sepia, Anaglyph 3D etc., to several images at once, convert images into a multi-page PDF document.

This guide describes how to resize multiple images using AVS Image Converter in the command line mode.

Even if you have never worked with...

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Windows sometimes has problems with file extensions and will name files with the wrong one. This holds especially true for recovery applications that might recover your files but with the wrong extensions. Renaming the extensions for all those files one by one can be extremely time-consuming. However, you can change them easily all at once by using the command prompt. Furthermore, you can use an easy function in Windows Explorer to put the same name in all of the files in a numerical sequence.

1. Changing extensions

First of all, you will need to put all of your files in the same folder. Then hold shift and right click on a blank spot in that folder. Choose the “open a command window here” option from the context menu. Now you will need to use the “Ren” (rename) command.

Say you want to rename your JPG files to PNG. You will use this command: Ren *.jpg *.png
This will turn all of the JPG file to PNG automatically. The asterisk is used to indicate...

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You're probably aware that most files have an extension such as TXT or EXE after the file name, even though these are not always displayed in Windows. File extensions are how Windows knows what to do with specific files, like opening text files in Notepad or Microsoft Office. However, if your business needs to remove the file extensions, using the command line and a batch file is much faster than renaming each file manually.

### The Command Prompt

The Windows Command Line is a familiar text interface for anyone that has worked with DOS or Unix, though it's not commonly used by the average person. Command prompt commands are often used by System Administrators for various tasks from checking the network diagnostics to making backups. Since there's no graphical user interface to them, they usually run much faster, but more importantly, command line commands can be executed in a batch – several different commands within a single line – to achieve some end. Open the command...

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

Deleting a all files in a folder except one folder in windows command prompt or batch script?

I am looking for a way to delete all files in folder but except one folder through windows batch script..can you please help me on this.

Windows Command Copy all files recursively to a Main Folder

I was wondering if there is a quick and dirty command that can copy all files in a directory and it’s subdirectory to another folder. The destination folder will have no subdirectories just all the so

How can I move all the files from one folder to another using the command line?

What is the best command to move all files from one folder to another? I want to do this from within a batch file.

Dos command to move all files from all subdir to one folder

i want to write 2 batch files. 1st: move all files in subdirs to root dir. eg: Folder1...

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How To Rename Multiple Files In Unix With Single Command. Learn about rename command in Linux that can rename multiple files. Users can rename multiple files in Linux using wildcards, using rename command.

renames command is a wonderful command to rename multiple files at once using commandline/terminal. “rename” renames the filenames supplied according to the rule specified as the first argument. The perlexpr argument is a Perl expression which is expected to modify the $_ string in Perl for at least some of the filenames specified. If a given filename is not modified by the expression, it will not be renamed. If no filenames are given on the command line, filenames will be read via standard input. #### Command Syntax rename [ -h|-m|-V ] [ -v ] [ -n ] [ -f ] [ -e|-E perlexpr]*|perlexpr [ files ] #### Command Usage For example, to rename all files matching “*.jpg” to png, we will use the rename command as rename ‘s/\.jpg$/\.png/’...

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One problem with recursive renames is that whatever method you use to locate the files, it passes the whole path to rename, not just the file name. That makes it hard to do complex renames in nested folders.

I use find's -execdir action to solve this problem. If you use -execdir instead of -exec, the specified command is run from the subdirectory containing the matched file. So, instead of passing the whole path to rename, it only passes ./filename. That makes it much easier to write the regex.

find /the/path -type f \ -name '*.abc' \ -execdir rename 's/\.\/(.+)\.abc$/version1_$1.abc/' '{}' \;

In detail:

-type f means only look for files, not directories -name '*.abc' means means only match filenames that end in .abc The backslashes after -type and -name are the bash line-continuation character. I use them to make this example more readable, but they are not needed in practice. However, the backslash at the end of the -execdir line is required. It is...
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Recently, I came across a problem where I had to change the file extension on a bunch of Windows files from no extension to .JPG. Someone sent me a large number of files, but for some strange reason, they had no file extension, even though they were images! Once I added the .JPG extension to the end of the file, I was able to open the images.

There are many other reasons why you may need to rename file extensions, so I’ll show you how you can change them one at a time if you have a small number of files or batch rename file extensions if you have lots of files.

If you have a file with no extension, Windows will probably assign a generic icon to it. When you try to open it, the Open With dialog will pop up where you’ll get a list of programs to choose from.

Obviously, since there is no file extension for the file, Windows is not able to determine which program should open it. If you want to change the file extension for the file, you first need to be...

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Do you want to batch rename file extensions in one simple step? Changing each file extension separately can be a pain in some cases where you have to change extensions of more than 100 files. There are two methods of changing batch file extensions quickly.

#### Method 1: Command Line

Select the folder which has all the files who’s extension you would like to change. As an example I have made a folder named “test”, inside this folder I have placed four images in .jpg format. To change the extension of the files inside the folder, press Shift and right-click on the folder and select Open Command Window Here.

You will now see a Command Window with the current folderdirectory open. Now type the following command line,

ren *.(current extension name) *.(extension you want)

Since I want to change the extension from .jpg to .jpg, in my case the command line would be,

ren *.jpg *.jpg

Now all the files inside the folder will change...

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Windows operating systems have the MS-DOS command prompt that allows you to manipulate—copy, delete and rename—files. In Linux, such commands are available via a terminal window. The way to change the file extension in both Windows and Linux is to rename a file providing the new extension.

### Video of the Day

In Windows XP/Vista, click "Start." Click "Run" (only Windows XP). Then type "cmd" and press "Enter" to open the command prompt window.

In the MS-DOS shell window, type "cd c:\path\to\file" and press "Enter." Example: cd c:\user\test. If the designated file is on a different logical drive (e.g., on drive D) type "d:" and press "Enter." Then type the "cd" command as above.

Type "dir" followed by "Enter" to list the directory content and find the designated file.

Type "rename filename.ext filename.new" and press "Enter"; ".new" is the new file extension (\"filename.ext\" stands for any file you might have; for example: rename report.txt...

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If you have a bunch of files in a folder which you want to name sequentially and convert them to the same file type or format, how do you go about doing this? If it is just a few files, you can do it manually, but what if there are say 10-20 or even a 100 files? In this post, we will see how to batch rename files as well as change file extension for all files in a folder quickly & easily in Windows 10/8/7. This can be especially useful if you have multiple photographs or images of various names or file extensions, like .jpg, .png, etc and you would like to rename them to say India1.jpg, India2.jpg, etc for the sake of convenience,

### Change file extension for all files in a folder

As an example, we are assuming that you have several files in a folder of varying names and different file formats or extensions, and we want to change all these images to the JPG file extension. To begin the process, open the folder, press Shift and right-click in an empty spot inside the...

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Tip: Although any file can be renamed, it doesn't mean that, after it has been renamed, it can be opened with any program. For example, you can rename a .BAT to a .EXE, however it will not run because a .EXE file is a compiled file. If you want to change the file type it must be converted or saved as the other file type with the different file extension.

Below is a listing of how to change the file extension for each of the major IBM compatible operating systems.

### Windows users

Before renaming a Windows file extension, you must have show file extensions enabled. By default, this option is disabled.

Assuming the file is named myfile.txt, we will rename it to myfile.doc.

Right-click on the file (not the shortcut) Select Rename in the menu Erase the .txt from myfile.txt. Type .doc (it is important to have the dot to separate the file name and file extension).

Renaming multiple file extensions

If you want to rename or change the file...

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You might have several files inside a folder with the same file extension that you want to rename or change the file extension of. For example, you might want to change the all .text extension to .txt or all .jpeg extensions to .jpg.

If you want to rename just a single file, then it is easy enough to use the mv command to do that. So, to rename the file mytextfile.text to mytextfile.txt, you could do

$mv -v mytextfile.text mytextfile.txt Unfortunately, it is not possible to use the mv command to rename multiple files simultaneously. There is a different command called rename which tackles this scenario. If you have the rename command installed on your machine, then this is a simple enough process.$ rename .text .txt myfile*.text

The above example will rename all files that match the regular expression myfile*.text. The .text part of the filename will be changed to .txt. The rename command is not limited to renaming just file extensions, you can...

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