PowerRename

Search for	Replace with	Description
(.*).png	foo_$1.png	Prepends "foo_" to the existing file name for PNG files
(.*).png	$1_foo.png	Appends "_foo" to the existing file name for PNG files
(.*)	$1.txt	Appends ".txt" extension to existing file
(^\w+\.$)\|(^\w+$)	$2.txt	Appends ".txt" extension to existing file name only if it does not have an extension
(\d\d)-(\d\d)-(\d\d\d\d) or (\d{2})-(\d{2})-(\d{4})	$3-$2-$1	Move numbers in the filename: "29-03-2020" becomes "2020-03-29"
^(.{n})(.*) or (.*)(.{n})$	$1foo$2	Insert "foo" n characters from the beginning or the end, respectively
^.{n} or .{n}$	nothing	Trim n characters from the beginning or the end, respectively

 

 

Replace using file creation date and time

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. Selecting the tool-tip in the Replace with field allows you to view and select from the supported patterns.

Variable pattern	Explanation
$YYYY	Year, represented by a full four or five digits, depending on the calendar used.
$YY	Year, represented only by the last two digits. A leading zero is added for single-digit years.
$Y	Year, represented only by the last digit.
$MMMM	Name of the month.
$MMM	Abbreviated name of the month.
$MM	Month, as digits with leading zeros for single-digit months.
$M	Month, as digits without leading zeros for single-digit months.
$DDDD	Name of the day of the week.
$DDD	Abbreviated name of the day of the week.
$DD	Day of the month, as digits with leading zeros for single-digit days.
$D	Day of the month, as digits without leading zeros for single-digit days.
$hh	Hours, with leading zeros for single-digit hours.
$h	Hours, without leading zeros for single-digit hours.
$mm	Minutes, with leading zeros for single-digit minutes.
$m	Minutes, without leading zeros for single-digit minutes.
$ss	Seconds, with leading zeros for single-digit seconds.
$s	Seconds, without leading zeros for single-digit seconds.
$fff	Milliseconds, represented by full three digits.
$ff	Milliseconds, represented only by the first two digits.
$f	Milliseconds, represented only by the first digit.