# How to auto-number files?

**URL:** <https://community.mp3tag.de/t/how-to-auto-number-files/3106>\
**Category:** General Discussion\
**Created:** [March 29, 2006, 9:15am UTC](https://community.mp3tag.de/t/how-to-auto-number-files/3106 "2006-03-29T09:15:06Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)\
**Post date:** [October 7, 2018, 4:02pm UTC](https://community.mp3tag.de/t/how-to-auto-number-files/3106/12 "2018-10-07T16:02:36Z")

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> [@Zontir](#):
>
> This

What are you referring to?  
On the problem of leading zeros see e.g.

> [@Remove leading zeros](https://community.mp3tag.de/t/remove-leading-zeros/14154/7):
>
> You can't use a function in a converter. Generally, you would first parse the name and end up with 01, 02, etc. in the TRACK field. Then you would apply the function to clean up the TRACK field using an action. After using the Filename-Tag converter you could use a Format value action in either a saved Action group or through an Action (Quick): Action type: Format value Field: TRACK Format string: $fmtNum(%track%) OR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .…

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