Convert your .aac files to .mp3 format online. No software to install.
Pro plan required (from €4.99 / $4.99/month).
Drag and drop your .aac file or click to browse.
Select MP3 as your output format.
Click Convert and download your .mp3 file.
Converting between AAC and MP3 changes the codec used for compression. MP3 offers the widest device compatibility of any audio format.
AAC (Advanced Audio Coding, introduced in 1997) uses Lossy (MDCT-based with TNS and PNS tools) compression. MP3 (MPEG Audio Layer III, introduced in 1993) uses Lossy (psychoacoustic model + MDCT) compression. AAC browser support: Universal. MP3 browser support: Universal.
Both AAC and MP3 use lossy compression. Converting between two lossy formats involves decoding the AAC file and re-encoding it as MP3, which introduces an additional generation of compression. To minimize quality loss, use the highest practical quality setting for the MP3 output.
Typical AAC file size: A 4-minute song at 256 kbps AAC-LC: ~7.3 MB. Typical MP3 file size: A 4-minute song at 192 kbps: ~5.5 MB; at 320 kbps: ~9.2 MB.
When converting between two lossy formats, use the highest practical bitrate for the output to minimize the quality impact of double compression. If possible, convert from the original lossless source instead of from a previously compressed file.
Pro plan required (from €4.99 / $4.99/month). No watermarks.
Create a free account in 10 seconds and start converting immediately. No credit card required.
Your file is sent over an encrypted connection to our provider CloudConvert, which converts it and deletes it after the conversion, within 24 hours at most. Details in our Privacy Policy.
Convert files from any device: desktop, tablet, or phone. No software to install, works in any modern browser.
SquishConvert supports over 358 file conversion combinations across images, documents, audio, and video.
Your converted .mp3 file maintains the best possible quality. No unnecessary compression or quality loss.
Audio conversion requires a Pro account. See pricing, from €4.99 / $4.99/month
No. Audio conversions need a Pro plan (from €4.99 / $4.99/month), with 100 audio or 20 video conversions a month.
It depends on the file size and on the queue at our provider. Small files usually take a few seconds.
Your file is sent over an encrypted connection to our provider CloudConvert, which converts it and deletes it after the conversion, within 24 hours at most. Details in our Privacy Policy.
Free users can convert files up to 10 MB. Pro users can convert files up to 500 MB.