I recently registered my own.com website. As a condition, I had to provide my address and telephone number details, which now appear at www.whois.net.My web host says it is a legal. PowerRenamer 3.5.3. Uncomplicated renaming utility that can apply different name changing patterns on the files and fo. April 1st, 15:30 GMT. MacOS 10.9 or later. Update of /cvsroot/syndirella/syndirella In directory sc8-pr-cvs1:/tmp/cvs-serv9478 Modified Files: MainForm.cs MainForm.resx Syndirella.csproj Log Message: Simple. We would like to show you a description here but the site won’t allow us. Introduction PowerRenamer allows you to rename all (or some) files in a folder according to certain rules. 4 basic functions are offered: Insert character in front, insert character in back, delete.

  1. Powerrename
  2. Powerrename Guide
  3. Powerrename Utility
  4. Powerrename Utility
  5. Powerrename Add Prefix

PowerRename is a bulk renaming tool that enables you to:

  • Modify the file names of a large number of files (without renaming all of the files the same name).
  • Perform a search and replace on a targeted section of file names.
  • Perform a regular expression rename on multiple files.
  • Check expected rename results in a preview window before finalizing a bulk rename.
  • Undo a rename operation after it is completed.


In this demo, all instances of the file name 'Pampalona' are replaced with 'Pamplona'. Since all of the files are uniquely named, this would have taken a long time to complete manually one-by-one. PowerRename enables a single bulk rename. Notice that the 'Undo Rename' (Ctrl+Z) command enables the ability to undo the change.

PowerRename menu

After selecting some files in Windows File Explorer, right-clicking and selecting PowerRename (which will appear only when enabled in PowerToys), the PowerRename menu will appear. The number of items (files) you've selected will be displayed, along with search and replace values, a list of options, and a preview window displaying results of the search and replace values you've entered.

Search for

Enter text or a regular expression to find the files in your selection that contain the criteria matching your entry. You will see the matching items in the Preview window.

Replace with

Enter text to replace the Search for value entered previously that match you're selected files. You can view the original file name and renamed file in the Preview window.

Options - Use Regular Expressions

If checked, the Search value will be interpreted as a regular expression (regex). The Replace value can also contain regex variables (see examples below). If not checked, the Search value will be interpreted as plain text to be replaced with the text in the Replace field.

For more information regarding the Use Boost library option in the settings menu for extended regex functionalities, see the regular expressions section.

Options - Case Sensitive

If checked, the text specified in the Search field will only match text in the items if the text is the same case. Case matching will be insensitive (not recognizing a difference between upper and lowercase letters) by default.

Options - Match All Occurrences

Power rename regular expression

If checked, all matches of text in the Search field will be replaced with the Replace text. Otherwise, only the first instance of the Search for text in the file name will be replaced (left to right).

For example, given the file name: powertoys-powerrename.txt:

  • Search for: power
  • Rename with: super

The value of the renamed file would result in:

  • Match All Occurrences (unchecked): supertoys-powerrename.txt
  • Match All Occurrences (checked): supertoys-superrename.txt

Options - Exclude Files

Files will not be included in the operation. Only folders will be included.

Options - Exclude Folders

Folders will not be included in the operation. Only files will be included.

Options - Exclude Subfolder Items

Items within folders will not be included in the operation. By default, all subfolder items are included.

Options - Enumerate Items

Appends a numeric suffix to file names that were modified in the operation. For example: foo.jpg -> foo (1).jpg

Options - Item Name Only

Only the file name portion (not the file extension) is modified by the operation. Codecows. For example: txt.txt -> NewName.txt

Options - Item Extension Only

Only the file extension portion (not the file name) is modified by the operation. For example: txt.txt -> txt.NewExtension

Replace using file creation date and time

Powerrename utility

The creation date and time attributes of a file can be used in the Replace with text by entering a variable pattern according to the table below.

Variable patternExplanation
$YYYYYear represented by a full four or five digits, depending on the calendar used.
$YYYear represented only by the last two digits. A leading zero is added for single-digit years.
$YYear represented only by the last digit.
$MMMMName of the month
$MMMAbbreviated name of the month
$MMMonth as digits with leading zeros for single-digit months.
$MMonth as digits without leading zeros for single-digit months.
$DDDDName of the day of the week
$DDDAbbreviated name of the day of the week
$DDDay of the month as digits with leading zeros for single-digit days.
$DDay of the month as digits without leading zeros for single-digit days.
$hhHours with leading zeros for single-digit hours
$hHours without leading zeros for single-digit hours
$mmMinutes with leading zeros for single-digit minutes.
$mMinutes without leading zeros for single-digit minutes.
$ssSeconds with leading zeros for single-digit seconds.
$sSeconds without leading zeros for single-digit seconds.
$fffMilliseconds represented by full three digits.
$ffMilliseconds represented only by the first two digits.
$fMilliseconds represented only by the first digit.

For example, given the file names:

  • powertoys.png, created on 11/02/2020
  • powertoys-menu.png, created on 11/03/2020

Enter the criteria to rename the items:

  • Search for: powertoys
  • Rename with: $MMM-$DD-$YY-powertoys

The value of the renamed file would result in:

  • Nov-02-20-powertoys.png
  • Nov-03-20-powertoys-menu.png

Regular Expressions


For most use cases, a simple search and replace is sufficient. There may be occasions, however, in which complicated renaming tasks come along that require more control. Regular Expressions can help.

Regular Expressions define a search pattern for text. They can be used to search, edit and manipulate text. The pattern defined by the regular expression may match once, several times, or not at all for a given string. PowerRename uses the ECMAScript grammar, which is common amongst modern programming languages.

To enable regular expressions, check the 'Use Regular Expressions' checkbox.

Note: You will likely want to check 'Match All Occurrences' while using regular expressions.

To use the Boost library instead of the standard library, check the Use Boost library option in the PowerToys settings. It enables extended features, like lookbehind, which are not supported by the standard library.

Examples of regular expressions

Simple matching examples

Search forDescription
^Match the beginning of the filename
$Match the end of the filename
.*Match all the text in the name
^fooMatch text that begins with 'foo'
bar$Match text that ends with 'bar'
^foo.*bar$Match text that begins with 'foo' and ends with 'bar'
.+?(?=bar)Match everything up to 'bar'
foo[sS]*barMatch everything between 'foo' and 'bar'

Matching and variable examples

When using the variables, the 'Match All Occurrences' option must be enabled.

Search forReplace WithDescription
(.*).pngfoo_$1.pngPrepends 'foo_' to the existing file name
(.*).png$1_foo.pngAppends '_foo' to the existing file name
(.*)$1.txtAppends '.txt' extension to existing file name
(^w+.$) (^w+$)$2.txtAppends '.txt' extension to existing file name only if it does not have an extension
(dd)-(dd)-(dddd)$3-$2-$1Move numbers in the filename: '29-03-2020' becomes '2020-03-29'

Additional resources for learning regular expressions

There are great examples/cheat sheets available online to help you

File List Filters

Filters can be used in PowerRename to narrow the results of the rename. Use the Preview window to check expected results. Select the column headers to switch between filters.

  • Original, the first column in the Preview window cycles between:

    • Checked: The file is selected be renamed.
    • Unchecked: The file is not selected to be renamed (even though it fits the value entered in the search criteria).
  • Renamed, the second column in the Preview windows can be toggled.

    • The default preview will show all selected files, with only files matching the Search for criteria displaying the updated rename value.
    • Selecting the Renamed header will toggle the preview to only display files that will be renamed. Other selected files from your original selection will not be visible.


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