# "Tag - Filename" character replacement
**URL:** https://community.mp3tag.de/t/tag-filename-character-replacement/11132
**Category:** Support
**Created:** [November 17, 2010, 5:38am UTC](https://community.mp3tag.de/t/tag-filename-character-replacement/11132 "2010-11-17T05:38:42Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Mikael](https://community.mp3tag.de/u/Mikael)
#### Post date: [November 17, 2010, 5:38am UTC](https://community.mp3tag.de/t/tag-filename-character-replacement/11132/1 "2010-11-17T05:38:42Z")
As default characters not compatible with file names in Windows are converted to nothing (the character is deleted from the filename). I'd like to replace them (/:\*?) with an underscore (\_) instead. Is this possible using $replace, or how do i do it?
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### Author:  [@mjcm](https://community.mp3tag.de/u/mjcm)
#### Post date: [November 17, 2010, 6:25am UTC](https://community.mp3tag.de/t/tag-filename-character-replacement/11132/2 "2010-11-17T06:25:51Z")
Use $validate.
see here
[How Do I replace ? and / with \_](https://community.mp3tag.de/t/11106/2)
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### Author:  [@Mikael](https://community.mp3tag.de/u/Mikael)
#### Post date: [November 17, 2010, 6:53am UTC](https://community.mp3tag.de/t/tag-filename-character-replacement/11132/3 "2010-11-17T06:53:01Z")
Seems my search fu wasn't up to the test... Thank you!
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:22pm UTC](https://community.mp3tag.de/t/tag-filename-character-replacement/11132/4 "2026-02-09T12:22:41Z")