AAC to MP3 for Email
Email attachments have size limits — usually 25MB. AAC files can still be too large. Convert to MP3 to shrink them down and send without issues.
Drop your AAC file here or click to browse
AAC (.aac) · Max 20 MB
Gmail, Outlook, and Yahoo all cap attachments at 25MB. A long AAC file can exceed that easily. Converting to MP3 at 128kbps keeps file sizes well under the limit.
For voice recordings and meetings, 128kbps mono is plenty. For music, 192kbps stereo sounds great and stays small. AudioUtils converts in your browser — no upload needed, no file touching anyone's server.
Drop your file, convert, download, attach. The whole process takes seconds. No signup, no email address required, no watermarks.
Frequently Asked Questions
Is AAC better than MP3?
At the same bitrate, AAC generally sounds better than MP3. It's a newer, more efficient codec. But MP3 has broader device support.
Will I lose quality converting AAC to MP3?
Some quality loss is inevitable when transcoding between lossy formats. Use a high bitrate (256-320kbps) to minimize the impact.
What's the difference between AAC and M4A?
AAC is the codec (compression method). M4A is the container format that usually holds AAC audio. They're closely related — M4A files typically contain AAC-encoded audio.
When should I keep AAC instead of converting?
If your devices support AAC, keep it — it's better quality. Only convert to MP3 when you need maximum compatibility.
About AAC
Advanced Audio Coding. Successor to MP3 with improved compression. Widely used in streaming services.
About MP3
The most widely used audio format. Great compatibility, small file size. Ideal for music, podcasts, and general use.