Many of my MP3s have ID3 fields that contain spaces at the beginning or at the end of the field. I'm looking for an application that:

  • can trim (= remove start and end spaces) every ID3 field of each MP3 in the folder(s) I select
  • walk the sub-folders recursively, i.e. not just take the MP3s located at the root of the folder
  • has a GUI
  • works on Windows, Linux, or Mac OS
  • is free or non-free

5 Answers 5


You should be able to do this with Mp3tag. Mp3tag has a replace with regular expression action that will allow you to remove spaces in any tag field you want.

Your requirements:

  • With some knowledge of regular expressions, you can trim spaces from the beginning and end of any ID3 field you want.
  • Has the option of looking in all subfolders of a selected folder
  • Has a GUI
  • Gratis, runs on Windows

To trim spaces (beginning and end of all tags), use the action (thanks Izzy!):

enter image description here

  • 3
    Hint on a regexp: ^\s+(.*)\s+$ replace by "$1" (or "\1", depending on what the application uses for back-references). If you also want to catch those having spaces only in front or in the end (the above only catches those having both): ^\s+(.*)$ for the former, ^(.*)\s+$ for the latter.
    – Izzy
    Commented Feb 25, 2014 at 21:09
  • 2
    @Izzy and Ben: Awesome, it works perfectly. I used $1 Thanks a lot! Commented Mar 20, 2014 at 0:56
  • Actually, this did not work for me. I used _TAG: ^\s+-> "" and _TAG: \s+$ -> "", which worked fine for me. Commented Jun 9, 2016 at 8:53

Puddletag is solution I'm using on Ubuntu. Puddletag generally looking is very similar to mp3tag available on windows platform.

puddletag main screen

Requested functions:

  • Trimming can be done using function Trim Whitespace (I don’t use this function personally since i do rename all files using my specific pattern)
  • Folders can be added recursively
  • GUI available
  • Free of charge and open-source works on Ubuntu, Fedora, can be downloaded as deb or source code, and included in Ubuntu repositories

Beside requested functions there are few other I consider very useful such as auto numbering, remove duplicate values, remove all except chosen value, update fields from tag, sort values, import and export artwork, scripting functions (RegEx) and one I like most tagging audio files using web based Tag Sources like MusicBrainz, Discogs, Amazon, FreeDB, AcoustID. Its even possible to use Mp3tag’s Tag Sources but that one I never tested.



I have seen the feature to remove whitespace in MP3diags but don't ask me which column it was. This program detects a myriad of errors and you could easily spend some days to fix them all.

It's free and available for all major platforms

enter image description here


Jaikoz Music Tagger has an inbuilt task specifically for this called Remove WhiteSpace, it also has a task called Remove Widespace that finds instances of multiple spaces together in the middle of text and reduces it down to one.

In this screenshot the first Album Artist value has both leading and trailing whitespace, and Jaikoz helpfully highlights this in pink, selecting the field and then choosing Edit:Remove Whitespace removes these. Of course you can select all fields and fix all fields in one go if you want.

There are also two spaces between Sonic and Youth, selecting Remove Widespace would reduce this to one.

Jaikoz works on OSX, Windows and Mac.

Showing Remove Whitespace.

Disclaimer: I am the Jaikoz developer.


You can set a rule in bliss to do this for you, so bliss trims all fields of a given type, for all albums:

Click the settings cog and enable the Tags rule:

Enable the tags rule

Now enable the trim rule, selecting the fields you'd like trimmed:

Choose which fields you'd like trimmed of whitespace

Finally, click "Apply rules" at the bottom of the page.

Disclaimer: I am the programmer and founder of the bliss project.

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