Convert MP3 to AAC
Convert MP3 files to AAC in seconds. Free, no upload, no watermark. Trim, compress or edit before you convert.
or drag & drop videos, audio or images here, or paste with Ctrl+V
MP4 · MOV · MKV · AVI · WebM · WMV · FLV · GIF · MP3 · WAV · M4A · and 40+ more
- Files never leave your device
- No sign-up, no watermark
- Free forever
How to convert MP3 to AAC
- Add your MP3 fileClick “Choose files” or drag & drop your MP3 file onto the page.
- Check the outputAAC is pre-selected. Optionally trim, crop, compress or tweak quality in the tabs.
- Convert & downloadClick “Convert & download”. Your AAC file is created on your device and saved instantly.
MP3 vs AAC
Short answer: AAC is a high-efficiency audio codec used by YouTube, iTunes and most streaming services.
What is MP3?
MP3 is the universal audio format. Every music player, car stereo and phone can play it.
What is AAC?
AAC is a high-efficiency audio codec used by YouTube, iTunes and most streaming services.
Quality
AAC is a compressed format. Choose a higher bitrate (192–320 kb/s) in the Audio settings for the best quality.
| MP3 | AAC | |
|---|---|---|
| Full name | MPEG-1 Audio Layer III | Advanced Audio Coding |
| Type | audio | audio |
| Best for | Music, podcasts and maximum compatibility | Streaming and mobile devices |
| MIME type | audio/mpeg | audio/aac |
Last updated 2026-11-13
MP3 to AAC: FAQ
Is this MP3 to AAC converter free?
Yes. Converting MP3 to AAC is completely free with no watermark, no sign-up and no file limits beyond what your device can handle. Optional Pro features like 4K export and AI subtitles are available if you need them, and a single 4K export can be unlocked without a subscription.
Are my MP3 files uploaded to a server?
No, never. The conversion runs entirely in your web browser using FFmpeg compiled to WebAssembly. Your MP3 file never leaves your computer or phone, and we never store it, which makes it private and fast.
Will I lose quality converting MP3 to AAC?
AAC is a compressed format. Choose a higher bitrate (192–320 kb/s) in the Audio settings for the best quality.
How do I convert MP3 to AAC on iPhone or Android?
Open this page in Safari or Chrome on your phone, tap “Choose files”, pick your MP3 file and tap “Convert & download”. No app install needed.
Can I convert multiple MP3 files to AAC at once?
Yes. Select several files and click “Convert all”. You can download them one by one or as a ZIP. Free users can batch-convert up to 5 files at a time; Pro removes the limit.
Can I edit the MP3 before converting?
Yes: trim, cut, crop, rotate, resize, change speed, adjust colour, add text, music or subtitles, and more, all before you export to AAC.