Opus to MP3

Opus is what WhatsApp and Discord voice notes actually are. Converting to MP3 is usually about getting a voice memo into software that has never heard of Opus.

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

Opus carries nothing that MP3 can also hold.
ID3 tags, which Opus could not store

Lost

Tags

Settings used

Decoded from Opus, re-encoded with LAME VBR at -q:a 2.

When not to convert

Not for storage. Opus at the same quality is a fraction of the MP3's size.

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 Opus to MP3 lose anything?

Yes. Tags cannot be carried into MP3 and is dropped. Opus is what WhatsApp and Discord voice notes actually are. Converting to MP3 is usually about getting a voice memo into software that has never heard of Opus.

Are my files uploaded when I convert Opus to MP3?

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 Opus to MP3?

Decoded from Opus, re-encoded with LAME VBR at -q:a 2.

When should I not convert Opus to MP3?

Not for storage. Opus at the same quality is a fraction of the MP3's size.