Convert MP3 to AAC online for compact audio that plays on phones, browsers and streaming apps. Upload files up to 20GB and download the converted result in a few clicks.
Convert AAC to MP3Drag & Drop your MP3 file here
MP3 files, up to 20GB
Files stay private.
Automatically deleted after 24 hours.
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20GB upload limit.
4.8/5
Trusted for 1,826,856+ conversions
HOW IT WORKS
Three steps, no account, nothing to install.
01
Upload the MP3
Drag and drop your MP3 files or select them from your device.
02
Convert to AAC
Keep AAC as the output and start. The audio is encoded as AAC-LC at 192 kbps for stereo or 96 kbps for mono.
03
Download the AAC
Save each .aac file when it is ready, or download several results together as a ZIP.
MP3
MP3 is a lossy compressed audio format built for small files and broad playback compatibility. It works on almost every phone, browser, car stereo, media player, and editing application.
AAC
AAC (Advanced Audio Coding) is a lossy audio codec that gives better quality than MP3 at similar file sizes. A .aac file is a bare ADTS stream with no container, so it holds no tags or cover art; the same audio in an MP4 container is an .m4a file.
FILE FORMATS
SOURCE
MPEG-1 Audio Layer III has been the universal music format since the 1990s. It compresses audio by removing sounds the ear is unlikely to hear, so a song takes a few megabytes instead of tens. ID3 tags carry the title, artist and album art, and every phone, browser, car stereo and editor plays it.
TARGET
Advanced Audio Coding replaced MP3 as the standard for phones and streaming: YouTube, Apple Music and Android all use it. It sounds better than MP3 at the same bitrate. A .aac file is a raw ADTS stream with no container, so it can't carry album art or chapters and some apps show limited tag information.
| Feature | MP3 | AAC |
|---|---|---|
| Developed by | MPEG (Fraunhofer) | MPEG (ISO) |
| File extension | .mp3 | .aac |
| Compression | Lossy | Lossy |
| Size vs uncompressed WAV | About 1/7 to 1/10 | About 1/10 |
| Tags and cover art | ID3 tags and cover art | Few or none (raw stream) |
| Best for | Music and podcasts everywhere | Efficient compressed audio |
| Plays on phones and browsers | Yes | Yes, most devices |
USE CASES
Practical workflows where MP3 to AAC conversion is useful.
Add an AAC track to a video
Video muxing tools accept raw .aac as an audio track. Convert the MP3, then add it to an MP4, MKV or TS file.
Prepare audio for an HLS stream
Audio-only HLS streams are often made of ADTS AAC segments. Convert the MP3 before packaging it.
Test AAC playback in an app
App and firmware developers can make ADTS AAC test files from existing MP3 material.
Load music on a player that lists .aac
Some media players, boxes and head units list .aac among their supported files. Convert the MP3 to match.
Meet an upload rule that asks for .aac
When a form, course or tool asks for a .aac file, convert the MP3 instead of re-recording it.
Play AAC in a browser audio element
Most current browsers play .aac files in an HTML audio element, which suits simple web players.
Convert mono narration
Mono narration stays mono in the .aac file and is encoded at 96 kbps AAC; stereo files get 192 kbps.
Compare codecs in a listening test
Make an AAC version of a track to compare with the MP3 on your own speakers or headphones.
Play audio on a microcontroller project
Audio libraries for boards such as the ESP32 can decode raw ADTS AAC files from an SD card.
Share audio without embedded tags
A .aac file cannot store tags or cover art, so the copy you send carries the audio only.
SUPPORTED FILES
MP3 files of any common bitrate are supported.
Songs and albums at any bitrate.
Spoken-word MP3s convert the same way.
Channels are kept as they are.
Each file can be up to 20GB.
Upload many MP3s and download the AAC files together as a ZIP.
TROUBLESHOOTING
A raw .aac file has a few limits worth knowing.
01
A .aac file is a raw audio stream with no place for cover art. Use our MP3 to M4A converter if you need artwork.
02
Many apps read few or no tags from raw .aac files. M4A keeps full tags.
03
MP3 to AAC is lossy to lossy, so the AAC can't sound better than the MP3.
04
Some apps only accept AAC inside an .m4a file. Try the MP3 to M4A converter.
05
Raw AAC streams have no index, so some players seek slowly. M4A seeks instantly.
06
Check the MP3 plays normally. A damaged file stops with a short message.
Audacity, foobar2000, fre:ac and Apple's Music app can all convert audio once they are installed and set up. dragdropdo is built for turning MP3 into AAC quickly, from any device.
| What matters | dragdropdo | Desktop Audio Converters |
|---|---|---|
| Nothing to install | ✓Yes. Runs in any modern browser. | ~Yes, a download, and sometimes an extra encoder or codec. |
| Works on phones and tablets | ✓Yes. Desktop, Android, iPhone and iPad. | ~Mostly desktop only. |
| Batch conversion | ✓Yes. Add many files and download one ZIP. | ~Varies. foobar2000 and fre:ac batch well; Audacity needs macros. |
| Share finished files | ✓Yes. Send a unique link from the result page. | ~You upload and share the files yourself. |
| Pricing | ✓Free with daily limits. $2.99 or $6.99 passes for unlimited use, no monthly plan. | ~Mostly free (Audacity, foobar2000, fre:ac). |
| Choosing bitrate and settings | ✓Fixed, high-quality settings chosen for AAC. | ~Yes. Most let you choose bitrate, sample rate and channels. |
Other tools use different pricing, limits and workflows. This comparison describes dragdropdo's own features without assuming every other tool works the same way.
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WHY DRAGDROPDO
Convert MP3 to AAC in your browser, with nothing to install and nothing kept after 24 hours.
Private by default
Files are encrypted in transit and deleted from our servers automatically after 24 hours.
No install required
Convert in any modern browser on Windows, Mac, Linux, Android, iPhone or iPad. No app and no sign-up wall.
Big files and batches
Upload files up to 20GB each, add several at once, and download the results one by one or as a ZIP.
Share & download
Save finished files to your device or pass them on with a share link from the result page.
MORE MP3 TOOLS
MP3 is a popular audio file format known for its efficient data compression and relatively high quality, making it ideal for music and audio streaming. Widely used for music downloads and digital media, MP3 files maintain a balance between sound quality and file size, ensuring quick downloads and easy sharing across platforms and devices.
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FAQ
Answers to common questions about dragdropdo's MP3 to AAC converter.
