# Regular Expressions **URL:** https://community.mp3tag.de/t/regular-expressions/521 **Category:** Howto **Created:** [October 16, 2003, 4:47pm UTC](https://community.mp3tag.de/t/regular-expressions/521 "2003-10-16T16:47:29Z") **Posts on this page:** 1 **Showing post:** 1
### Author: ![Florian](https://community.mp3tag.de/user_avatar/community.mp3tag.de/florian/32/5759_2.png) [@Florian](https://community.mp3tag.de/u/Florian) #### Post date: [October 16, 2003, 4:47pm UTC](https://community.mp3tag.de/t/regular-expressions/521/1 "2003-10-16T16:47:29Z")
### This topic collects some useful regular expressions. If you created a regular expression which solves a common task, please post it here and give a **short description** what it is supposed to do. These regular expressions can be used with the action type **Replace with regular expression**. Please look at [FAQ: How do I create a new action?](https://community.mp3tag.de/t/967/1) to learn more about actions in Mp3tag. > **Important** : The regular expressions are user-contributed solutions of individual tasks. Test with a copy of your files first before applying them. Some of the expressions also apply to `_ALL` or `_TAG`, which might be too coarse-grained for you, if you want to only change a specific tag field. > > **If you have questions or problems with a regular expression, please open a separate topic.** --- _[View the full topic](https://community.mp3tag.de/t/regular-expressions/521)._