# Change file extension to lowercase - Regular expression

**URL:** https://community.mp3tag.de/t/change-file-extension-to-lowercase-regular-expression/59816
**Category:** General Discussion
**Created:** [January 27, 2023, 2:46pm UTC](https://community.mp3tag.de/t/change-file-extension-to-lowercase-regular-expression/59816 "2023-01-27T14:46:12Z")
**Posts on this page:** 1
**Showing post:** 16

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### Author: ![wneclass2018](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/w/cdc98d/32.png) [@wneclass2018](https://community.mp3tag.de/u/wneclass2018)
#### Post date: [February 20, 2023, 10:21pm UTC](https://community.mp3tag.de/t/change-file-extension-to-lowercase-regular-expression/59816/16 "2023-02-20T22:21:08Z")

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This action file, below, will solve your problems, and if you're looking to change the file extension of a file, in a WYSWYG manner, visit this community post: [FINALLY SOLVED: ACTIONS that mimics a WYSIWYG to Change File Extension or File Name and Extension (2022-2023)](https://community.mp3tag.de/t/finally-solved-actions-that-mimics-a-wysiwyg-to-change-file-extension-or-file-name-and-extension-2022-2023/60139)

There is no additional fields or placeholders required for this action. Just place it inside the actions folder, which is located here: %AppData%\Mp3tag\data\actions or C:\Users%username%\AppData\Roaming\Mp3tag\data\actions

[CONVERT File Extension (%\_extension%) to Lowercase by wneclass2018 (February 20th 2023).mta](https://community.mp3tag.de/uploads/short-url/6MrYXx5zKH3i4cH9cQMZSGahkBG.mta) (759 Bytes)

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