MP3 を FLAC に変換

Free online MP3 to FLAC converter. Fast, secure, no signup required.

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Accepted: MP3 files · Max 100 MB per file

mp3 flac

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Need to convert MP3 to FLAC? MegaConvert makes it easy. Upload your MPEG Audio Layer III (MP3) file and get a Free Lossless Audio Codec (FLAC) file in seconds — no software to install, no signup required. Whether you need this conversion for music playback, podcasting, device compatibility / web streaming, our online converter handles it instantly. Free for files up to 25MB, with support for larger files up to 2GB.

How to Convert MP3 to FLAC Online

1
Upload your MP3 file
Click the upload area or drag and drop your MP3 file. Files up to 25MB are free. Larger files are supported with pay-per-use.
2
Choose FLAC as output format
FLAC is automatically selected on this page. You can adjust conversion settings if needed.
3
Click Convert
Hit the Convert button to start processing. Your file will be converted using our high-performance servers.
4
Download your FLAC file
Once conversion is complete, click Download to save your new FLAC file. Free files are available for 1 hour.

Why Convert MP3 to FLAC?

**Reduce file size** — Converting between formats can significantly reduce file size, making files easier to share via email or cloud storage.
**Software requirements** — Your software or platform may require FLAC format specifically. Converting ensures full compatibility.

MP3 vs FLAC — Format Comparison

Feature	MP3	FLAC
Full Name	MPEG Audio Layer III	Free Lossless Audio Codec
Developer	Fraunhofer Society	Xiph.Org Foundation
First Released	1993	2001
Category	Audio	Audio
Extension	.mp3	.flac
MIME Type	audio/mpeg	audio/flac

Converting from lossy to lossless does not improve quality. Start from lossless source when possible.

About MP3 Format

Most popular lossy audio compression format, widely used for music distribution.

Full name: MPEG Audio Layer III

Developer: Fraunhofer Society (1993)

About FLAC Format

Lossless audio codec achieving 50-70% compression while preserving perfect audio quality.

Full name: Free Lossless Audio Codec

Developer: Xiph.Org Foundation (2001)

よくある質問

Upload your MP3 file to MegaConvert.io, select FLAC as the output format, and click Convert. Your converted file will be ready to download in seconds. No software installation required.

Yes! Files up to 25MB can be converted for free, up to 3 times per day. For larger files, pay-per-use pricing starts at just $2 for files up to 100MB.

Absolutely. All uploaded files are encrypted in transit (HTTPS), scanned for viruses, and automatically deleted after conversion. We never share or access your files.

Free users can convert files up to 25MB. Pay-per-use supports files up to 2GB. Subscribers get up to 2GB with priority processing.

Most popular lossy audio compression format, widely used for music distribution. Developer: Fraunhofer Society (1993).

Lossless audio codec achieving 50-70% compression while preserving perfect audio quality. Developer: Xiph.Org Foundation (2001).