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  • Repair damaged audio files under different cases of corruption.
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[Full Guide] What Are FLAC Audio Files & How to Repair?


4 mins read

For professionals in the realm of music, the FLAC file format should be familiar to them. But for others, knowing what are FLAC audio files is also an important thing since all of us do want to preserve and listen to the audio of their highest quality.

This article will briefly introduce the FLAC audio format, how to repair when they get corrupted and their differences with the MP3 files!

what are flac audio files

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Download UltraRepair to repair FLAC audio files that get corrupted.

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In this article:

Part 1: What is a FLAC Audio File?

FLAC (Free Lossless Audio Codec) is a widely used audio compression format that retains original audio quality during compression, making it popular among professionals in music production.

It's ideal for archiving high-quality audio, but results in larger file sizes compared to lossy formats like MP3, which may be a trouble for devices with limited storage.

Part 2: How to Open FLAC Audio Files?

1 Try VLC

VLC is a popular open-source media player that works on Windows, Mac, Linux and more. As a versatile media player, it supports to play audio and video of diverse formats, including FLAC.

All you have to do is download and launch it, then play the FLAC audio files using it for free.

open flac file with vlc

2 iTunes

iTunes is actually known for playing media files of AAC format. It can also play FLAC files as well, though extra settings is needed.

To use it for FLAC audio playback, you may need to first convert it to ALAC, the lossless format that Apple supports.

open flac file with itunes

3 Windows Media Player with Codecs

By default, Windows Media Player does not support the FLAC files. However, you can install codec packs such as the K-Lite Codec Pack or the Media Player Codec Pack to add support for FLAC files.

windows media player with codec

Part 3: How to Repair FLAC Audio Files?

The FLAC audio files, like MP3 format, is susceptible to corruption. And here are some reasons to their corruption:

  • Incomplete downloads or transfers due to connectivity issues can corrupt FLAC files.
  • Storage medium problems like bad sectors or issues with drives can lead to the problem.
  • Malicious software can infect and alter files, potentially causing corruption.
  • Improper computer shutdowns (e.g., power failure) can corrupt the files.
  • Incorrect modifications in unsupported software can cause the problem.

Now we know what cause the FALC to corrupt, it’s time to check out how to repair them in order to regain the full control of these files.

How to repair FLAC audio files?

To ensure that the whole files can be rescued without altering the high quality, the professional audio repair tool iMyFone UltraRepair should be what you need.

As a dedicated file repair tool, UltraRepair works to cover all scenarios of file corruption including corrupted audio repair.

That means files that get corrupted due to various reasons can all be repaired and recovered to the original state, with its advanced-repair mode guarantees files to be repaired at a higher success rate.

iMyFone UltraRepair

Key Features:

  • Repair audios of different formats, including FLAC, MP3, M4A, WAV, etc.
  • Support to repair corrupted audios in all levels of corruption, such as clipping, sibilant, humming, buzzing, rumbling, out-of-sync, etc.
  • Batch repair multiple damaged audio files at once.
  • Repair audio files without file size and number limit.
  • Compatible with popular running systems including Windows and Mac.

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Watch how to repair corrupted audio files including MP3, WAV and FLAC:

how to repair corrupted audio files

How to repair FLAC audio files:

Step 1: Download and launch the software to choose Repair tab, then click Add files and start repairing.

 ultrarepair interface

Step 2: Upload all the corrupted FLAC audio files, then click Repair.

repair flac audio files

Step 3: Preview or save the repaired files as copy.

save repaired flac audio files

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Part 4: FLAC VS MP3 (With Comparison Table)

So, what are the differences between FLAC and MP3 files? To know more, please check out the comparison table below.

Characteristic FLAC (Free Lossless Audio Codec) MP3 (MPEG Audio Layer-3)
Compression Type Lossless Lossy
Audio Quality Maintains original quality Quality loss due to compression
File Size Larger (compared to MP3) Smaller (compared to FLAC)
Storage Efficiency Requires more storage space Requires less storage space
Compatibility May not be supported by all devices Widely supported on various devices
Audio Fidelity High fidelity, no loss of data Some audio data is lost during compression
Popular Use Cases Archiving, professional audio production Portable music players, online streaming
Bitrate Adjustment Bitrate can be adjusted during encoding Bitrate adjustment affects quality
Licensing Open source, no licensing fees Patented technology, licensing fees may apply
Editing Flexibility Retains all original audio information Limited due to loss of data in compression
Streaming Not ideal for streaming due to large size Efficient for streaming over the internet
Data Integrity Less susceptible to corruption or data loss More susceptible to data loss or corruption


In this article, we’ve introduced what are FLAC audio files, how to repair them with the Audio Repair Tool when get corrupted and their differences between MP3 files. Hope you can have a better understanding of this file format and enjoy a better experience.

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