# How to check files for errors?

**URL:** https://community.mp3tag.de/t/how-to-check-files-for-errors/44633
**Category:** Howto
**Created:** [February 23, 2019, 7:49am UTC](https://community.mp3tag.de/t/how-to-check-files-for-errors/44633 "2019-02-23T07:49:49Z")
**Posts on this page:** 1
**Showing post:** 4

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### 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: [February 3, 2022, 4:29pm UTC](https://community.mp3tag.de/t/how-to-check-files-for-errors/44633/4 "2022-02-03T16:29:35Z")

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# How to repair files identified as corrupted?

If the file in question is a MP3 file which is reported as corrupted or where the MP3 header cannot be read, chances are it is an MP4 file with a `*.mp3` file extension. This often happens if online services, e.g., to download files from YouTube are involved. Changing the file extension to `*.mp4` might solve the problem.

If the problematic file is a WAV or AIF file, re-saving the file with an audio-editing program like Audacity might repair the files. It's also possible to [use ffmpeg via a user-defined tool](https://community.mp3tag.de/t/user-defined-tools/966/7) from within Mp3tag

Please also listen to the end of the file to make sure the file isn’t truncated.

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