MP3 to M4A

AAC is the better codec, but re-encoding an MP3 into it cannot recover what MP3 removed. The result is a slightly worse file in a more modern container.

Runs in your browser // nothing is uploaded

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What survives the conversion

Derived from what each format is able to store, not from what the conversion promises.

Kept

MP3 carries nothing that M4A can also hold.
Tags, which MP3 could not store
Embedded cover art, which MP3 could not store
Chapters, which MP3 could not store

Lost

ID3 tags

Settings used

Decoded from MP3, re-encoded as AAC at 192 kbps in an MP4 container.

When not to convert

Usually. Keep the MP3 unless a specific device or app requires M4A.

About these formats

Audio

What is a MP3 file?

MP3 is the lossy audio format that made digital music portable, standardised as part of MPEG-1 in 1993. Newer codecs such as AAC and Opus sound better at the same bitrate, but nothing matches MP3 for sheer universality: it plays on essentially any device ever made.

Read the format guide

Common questions

Does converting MP3 to M4A lose anything?

Yes. ID3 tags cannot be carried into M4A and is dropped. AAC is the better codec, but re-encoding an MP3 into it cannot recover what MP3 removed. The result is a slightly worse file in a more modern container.

Are my files uploaded when I convert MP3 to M4A?

No. The conversion runs in your browser tab, so the file is never transmitted and the page works offline once loaded.

What settings does Filoven use for MP3 to M4A?

Decoded from MP3, re-encoded as AAC at 192 kbps in an MP4 container.

When should I not convert MP3 to M4A?

Usually. Keep the MP3 unless a specific device or app requires M4A.