MP3 vs MP4: codec vs container explained simply.
Common confusion

MP3

vs
MP4

These are often compared, but they are not the same type of thing. One is a codec, the other is a container.

TL;DR: MP3 is an audio codec. MP4 is a container that can hold audio, video, and more.
Codec • Container • Audio

TL;DR

MP3: audio format

MP4: file container

MP3 vs MP4 at a glance

FeatureMP3MP4
TypeAudio codecContainer format
PurposeCompress audioStore audio, video, subtitles
Common useMusic filesVideo files, streaming

What about LAME MP3?

LAME encoder

LAME is one of the most respected MP3 encoders, known for high-quality output and efficient compression.

Why it still matters

Even with newer codecs, MP3 remains widely used. Improvements in encoders like LAME have kept it relevant.

Modern relevance

MP3 is still useful for compatibility and portability, even if newer codecs offer better efficiency.