# A way to batch copy contents of one field to another field?
**URL:** https://community.mp3tag.de/t/a-way-to-batch-copy-contents-of-one-field-to-another-field/8781
**Category:** Support
**Created:** [August 15, 2009, 5:58pm UTC](https://community.mp3tag.de/t/a-way-to-batch-copy-contents-of-one-field-to-another-field/8781 "2009-08-15T17:58:04Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@jyang](https://community.mp3tag.de/u/jyang)
#### Post date: [August 15, 2009, 5:58pm UTC](https://community.mp3tag.de/t/a-way-to-batch-copy-contents-of-one-field-to-another-field/8781/1 "2009-08-15T17:58:04Z")
I have a lot of classical mp3's with info in the composer field that I want to mass transfer to the genre field (my mp3 player can read genre, but not composer). I was trying to make an action using
Replace "GENRE": "%genre%" -\> "%composer%"
but I don't think this is how the syntax or the intent of it is supposed to work (it didn't work).
I was also thinking of just sorting by composer and copying and pasting the info over by hand, or using some combination of that and tag-\>filename and filename-\>tag, but was wondering if there were a tidy way to write an action for it instead (the other methods could introduce mistakes, or with using the filename as a temp holder for the tag info, could run into problems with filename length, illegal characters, etc)..
Thanks!
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### Author:  [@DetlevD](https://community.mp3tag.de/u/DetlevD)
#### Post date: [August 16, 2009, 6:44am UTC](https://community.mp3tag.de/t/a-way-to-batch-copy-contents-of-one-field-to-another-field/8781/2 "2009-08-16T06:44:12Z")
> [@jyang](#):
>
> ... I want to mass transfer to the genre field ... I was trying to make an action using
> Replace "GENRE": "%genre%" -\> "%composer%"
> but I don't think this is how the syntax or the intent of it is supposed to work (it didn't work).
> ...
[https://docs.mp3tag.de/actions/format](https://docs.mp3tag.de/actions/format)
DD.20090816.1045.CEST
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### Author:  [@jyang](https://community.mp3tag.de/u/jyang)
#### Post date: [August 16, 2009, 6:00pm UTC](https://community.mp3tag.de/t/a-way-to-batch-copy-contents-of-one-field-to-another-field/8781/3 "2009-08-16T18:00:44Z")
> [@DetlevD](#):
>
> [https://docs.mp3tag.de/actions/format](https://docs.mp3tag.de/actions/format)
>
> DD.20090816.1045.CEST
Thanks! I'm sorry I missed that -- I guess I didn't look hard enough, so, I definitely appreciate it..
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:21pm UTC](https://community.mp3tag.de/t/a-way-to-batch-copy-contents-of-one-field-to-another-field/8781/4 "2026-02-09T12:21:43Z")