Free online MP3 to FLAC converter

Converting .mp3 audio to .flac format.

Convert MP3 to FLAC online - free

.mp3 .flac

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How to convert mp3 to flac file

June 7, 2026
Audio
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Converting MP3 Audio Files directly to Free Lossless Audio Codec Files (.mp3 to .flac conversion) is possible and relatively straightforward.

Use one of several audio editing programs or (online) conversion tools, such as Adobe Audition or MediaMonkey, which allow users to import MP3 audio files and export them in FLAC format.

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Understanding MP3 and FLAC file formats

MP3 (MPEG Audio Layer III) is a popular audio format known for its ability to compress audio files to a smaller size while maintaining reasonable sound quality. It is widely used for music streaming and storage due to its compatibility with most devices and software.

FLAC (Free Lossless Audio Codec) is an audio format that compresses audio files without any loss in quality. It is favored by audiophiles and music enthusiasts who seek high-fidelity sound. FLAC files are larger than MP3s but offer superior audio quality.

Why convert MP3 to FLAC?

Converting MP3 to FLAC can be beneficial if you want to preserve the audio quality of your existing MP3 files. While the conversion won't improve the original MP3 quality, it allows you to store your audio in a lossless format for future use or editing.

Best software for MP3 to FLAC conversion

One of the best software options for converting MP3 to FLAC is Audacity. It is a free, open-source audio editor that supports a wide range of audio formats.

To convert MP3 to FLAC using Audacity, follow these steps:

Open Audacity and File → Open to load your MP3 file.
Once the file is loaded, go to File → Export → Export Audio.
In the Save as type dropdown menu, select FLAC Files.
Choose your desired settings and click Save.

Another excellent tool is fre:ac, a free audio converter that supports batch conversion and a variety of formats.

Conclusion

Converting MP3 to FLAC is a straightforward process that can be accomplished using tools like Audacity or fre:ac. While the conversion won't enhance the original MP3 quality, it allows you to store your audio in a lossless format, ensuring no further quality loss in future conversions or edits.

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MP3 vs FLAC: format comparison

How the MP3 and FLAC formats compare on the properties that matter most for this conversion.

Comparison of the MP3 and FLAC file formats
Property	.MP3 MPEG-1 Audio Layer III	.FLAC Free Lossless Audio Codec
Compression	Lossy	Lossless
Audio quality	High	Lossless
Audio channels	Up to stereo	Up to stereo
Metadata support	Extensive	Extensive
Streaming	Partial	Partial
DRM protection	Optional	No DRM
Opens in a web browser	Yes, natively	Partial
Typical file size	Small	Medium
Open standard	Partly open	Yes
Best used for	Music	Music
Introduced	1993	2001
Developer	Moving Picture Experts Group (MPEG)	Xiph.Org Foundation
MIME type	audio/mpeg	audio/flac

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Frequently asked questions

Is the MP3 to FLAC converter free?

Yes, converting MP3 to FLAC on 101convert.com is completely free. No registration, email address or installation is required.

How large can my MP3 file be?

You can upload MP3 files up to 1000 MB and convert up to 100 files at once in a single batch.

What happens to my uploaded files?

Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.

Do I need to install any software to convert MP3 to FLAC?

No. The MP3 to FLAC conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.

Did the conversion fail?

In most cases, the cause is an incorrect file format. Please upload a valid MP3 file for this MP3 to FLAC conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.

mp3 to fla mp3 to flv

Additional formats for
mp3 file conversion

Reverse conversion

flac to mp3

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Free online MP3 to FLAC converter

Convert MP3 to FLAC online - free