# Case Conversion with regex

**URL:** https://community.mp3tag.de/t/case-conversion-with-regex/2745
**Category:** Support
**Created:** [January 8, 2006, 3:23pm UTC](https://community.mp3tag.de/t/case-conversion-with-regex/2745 "2006-01-08T15:23:35Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![dano](https://community.mp3tag.de/user_avatar/community.mp3tag.de/dano/32/6_2.png) [@dano](https://community.mp3tag.de/u/dano)
#### Post date: [January 8, 2006, 3:38pm UTC](https://community.mp3tag.de/t/case-conversion-with-regex/2745/2 "2006-01-08T15:38:52Z")

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Try this approach:

> [@](#):
>
> RegExp:  
> \s(a|the|of|to|an|and)(?=\s)  
> Replace:  
> $lower($0)

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_[View the full topic](https://community.mp3tag.de/t/case-conversion-with-regex/2745)._