Transcode an AAC audio file to MP3 for maximum device compatibility. AAC sounds slightly better than MP3 at the same bitrate, but MP3 still wins on universal hardware support — especially older car stereos and feature phones.
AAC (Advanced Audio Coding) is the successor to MP3. At the same bitrate it sounds noticeably better, which is why YouTube, Apple Music, iTunes, and the entire Apple ecosystem use AAC by default. It is supported by every iPhone, Android, browser, and modern car stereo — a strict upgrade over MP3 for new files.
MP3 is the most compatible audio format ever made. It plays on every device built in the last 25 years, from a $5 Bluetooth speaker to a Tesla, and 320 kbps MP3 is sonically indistinguishable from CD for most listeners. Pick MP3 when you want a file that will simply play, everywhere, without anyone asking what a codec is.
Server-side ffmpeg + yt-dlp on auto-scaling workers. Most files finish in seconds, not minutes.
Every uploaded or fetched file is virus-scanned before it ever reaches your download.
Files live on encrypted S3 storage for 2 hours, then are permanently purged. We never log file contents.
Free for up to 10 conversions per hour with no account. Pro unlocks larger files and priority queue.
Drop a AAC file from your device, or paste a public URL pointing to the AAC you want to convert.
The output is pre-set to MP3. You can adjust quality or bitrate in the advanced options if you need a smaller file.
Click Convert. Our cloud workers fetch the AAC, scan it for malware, and run the AAC → MP3 pipeline.
A one-time pre-signed link appears as soon as the MP3 is ready. The file is automatically deleted from our storage 2 hours later.
Browse other popular file conversions handled by the same pipeline.