MP3 to AAC Converter

MP3 is the format that made digital music mainstream — lossy compression that plays back on essentially every device made in the last 25 years.

MP3 (MPEG-1 Audio Layer III) was developed by the Fraunhofer Institute and standardized as part of MPEG in the early 1990s, and it became the format that made portable digital music practical in the first place — shrinking a CD-quality track down to roughly a tenth of its uncompressed size by discarding audio detail the human ear is least sensitive to. Decades later, despite the rise of more efficient codecs like AAC and Opus, MP3 remains the safest choice whenever compatibility is the priority, since there's essentially no device or piece of software made in the last two decades that can't play it.

AAC is the compressed audio format behind iTunes, YouTube, and most streaming services — generally more efficient than MP3 at the same bitrate.

AAC (Advanced Audio Coding) was developed as the designated successor to MP3 under the MPEG standard, using newer compression techniques to squeeze out noticeably better sound quality at the same bitrate, or an equivalent quality at a smaller file size. Apple adopted it as the default format across iTunes and the iPhone early on, and it's since become the standard codec behind most video and streaming platforms as well, since it handles the low bitrates needed for streaming particularly well.