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Convert MP3 to AAC Online


CONVERT MP3 to AAC ONLINE

1) Upload MP3 file to convert

 

Drop files here, or Click to select
0 %

2) Set converting MP3 to AAC options

Convert to

 

Options

3) Get converted file

DOWNLOAD CONVERTED FILE
Full version
Get Total Audio Converter to convert whole albums in one go.


Audio Converter To Convert Almost All Audio Formats
  • Convert Audio Files in Batch!;
  • Convert MP3 to AAC and in many other formats
  • Convert hundreds of tracks in 3 clicks;
  • Have a desktop converter that works without Internet;
  • Get additional settings;
  • Keep your files safe, don't send them to the web.
See features
NOW 20% OFF - $24.90 $17.43
*Only this month. Not for resellers.
close Total Audio Converter
okTotal Audio Converter supports WAV, MP3, OGG, WMA, APE, FLAC, MP4, AAC, MPC and many other rare image file types files (complete list).
okRip CDs to WAV, FLAC, OGG, MP3, AAC, WMA, MPC, APE and other formats with Total Audio Converter!
okNo tech knowledge required. Intuitive interface makes it easy for everybody to be the master of audio conversions. If you do not know what bit rate or frequency to choose the wizard of the program will automatically set the most appropriate.
okWhat to combine tracks into one audio file? Total Audio Converter can do that too!
okConvert MP3, WAV, AAC and many other files in seconds via our foolproof interface with lots of hints for beginners.
okCNet editor's review: TAC is reasonably attractive and plenty powerful to justify its $20 price.
okTotal Audio Converter converts a lot of rare audio file types like NIST, AU, TTA, MOD, MIDI, XM, PAF, SPX audios.
okTotal Audio Converter can split FLAC and APE files by CUE (split CUE-based FLAC, split CUE-based APE).
okPrice. No hidden costs! Our pricing is clear and concise. Once paid you get all the upgrades for free. Tech support is also free to registered users (sure we will answer all your questions even if you are using trial version of Total Audio Converter).
okTotal Audio Converter can get audio tracks from YouTube videos - just paste the url.
okTotal Audio Converter can be run via command line (get the ready-to-use command line from GUI settings).
okSoftonic Editor: Total Audio Converter is an easy-to-use tool conversion tool with support for a bunch of formats and ability to rip audio CDs.

How to convert MP3 to AAC?

1

💾 Upload Your File: Go to the site, click on «Upload File,» and select your MP3 file.

2

✍️ Set Conversion Options: Choose AAC as the output format and adjust any additional options if needed.

3

Convert and Download: Click 👉«Download Converted File»👈 to get your AAC file.


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Cloud Based
There is no need to install any software to convert MP3 to AAC with CoolUtils. Simply access the internet, and you can easily convert your file online with our service.
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Secure
Our hardware operates in top-tier, highly secure data centers equipped with advanced electronic surveillance and multi-factor access control systems.
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Ease of Use
Converting MP3 audio to AAC online has never been so simple. Drop your .mp3 file and the converter re-encodes the audio as AAC — typically better perceived quality at the same bitrate, native on iPhone, Android, and YouTube.
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Privacy
We understand the importance of privacy, which is why we've developed a comprehensive privacy policy detailing how we handle your files and personal information. You can read the policy here.

 

MP3 File

File extension .MP3
CategoryAudio File
DescriptionMP3 is the most popular audio file type based on MPEG-1 Layer III compression. Its lossy algorithm was developed in 1991. MP3 codes the sound almost with the same quality, as CD (16-bit stereo), providing compression in size 1 to 10 from the original WAF or AIFF tracks. The quality of MP3 seriously depends on the bitrate. It can be 128 - 256 kbps. Higher bitrates are also supported, but they seriously increase the file size. It is supported by all modern hard- and software players.
Associated programsRealOne
WinAmp
Windows Media Player
iTunes
Developed byFraunhofer Institute
MIME typeaudio/mpeg
audio/MPA
audio/mpa-robust
Useful linksMore detailed information on MP3 files
Conversion typeMP3 to AAC

AAC File

File extension .AAC
CategoryAudio File
DescriptionAAC utilizes lossy compression algo that is now considered as the best data zipping technology for high-quality audio data. This is the last standard of MPEG-2 family. There are 4 types of AAC: HomeboyAAC, Liquifier PRO AAC, AT&T AAC and Astrid/QhartexAAC. The last one surpasses MP4 and VQF formats in terms of size-quality ratio, especially on frequencies higher than 16 kHc. It supports up to 48 channels. Each AAC modification uses its own software for playback and coding sound.
Associated programsKMPlayer
RealPlayer
VideoLAN VLC Media Player
Windows Media Player
iTunes
Developed byA combination of Fraunhofer IIS, AT&T Bell Laboratories, Dolby and Sony Corporation
MIME typeaudio/aac
Useful linksMore detailed information on AAC files
5 star2026-01-22
I re-encoded my old 128 kbps MP3 library to AAC at the same bitrate and the difference on AirPods was immediately noticeable — cleaner highs and better stereo separation. The batch converter processed 1,200 files overnight without any failures.
Sophie Leclerc
5 star2026-03-15
Upgraded my iTunes library from MP3 to AAC for streaming-optimized playback on Apple TV — the converter preserved all ID3 tags correctly and the output was recognized by iTunes without re-importing. Exactly what I needed for a smooth library migration.
Takeshi Ono
4 star2026-04-28
Used this to convert podcast source files from MP3 to AAC for a client whose distribution platform required AAC — straightforward and fast. Processing 300 episodes took about 20 minutes total.
Marcus Webb

Rating MP3 to AAC   5 star MP3 to AAC   4.7 (640 votes)
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MP3 to AAC Converter — Frequently Asked Questions ▼

Both are lossy audio codecs from the MPEG family. AAC is newer (1997 vs 1993 for MP3) and uses a more efficient psychoacoustic model, so at 128 kbps AAC sounds noticeably cleaner than MP3 — especially on cymbals, voices, and bass.
Not really. Re-encoding lossy audio adds a small additional loss. The AAC will sound very similar to the MP3 (and a bit better on some material because of AAC's smarter algorithm), but it will not recover information the original MP3 encoder discarded.
Upload your .mp3 file using the button above. The converter decodes the MP3 to PCM, then re-encodes that PCM with the AAC algorithm, and produces an .aac file you can download. No software install is required.
At the same nominal bitrate, the file sizes are nearly identical. AAC's advantage is quality per kilobit — you can drop the AAC bitrate to 96-112 kbps and still match the perceived quality of a 128 kbps MP3, which saves space.
Yes — use Total Audio Converter on the desktop. Run: TotalAudioConverter.exe C:\mp3_files C:\aac_out /ConvertTo aac /ProcessRecursively to process an entire folder including subfolders without opening the GUI.
Online uploads are limited to 50 MB. A 50 MB MP3 at 192 kbps is roughly 35 minutes of audio. For longer files or full albums, use Total Audio Converter on your desktop — it has no size limit.
Files you upload are deleted automatically after you download the AAC result. They are not stored or shared. For confidential audio, run the conversion locally with Total Audio Converter on your own machine.
 

 

Convert MP3 to AAC — Get Smaller, Better-Sounding Files at the Same Bitrate

AAC is the successor to MP3 — at the same bitrate it sounds clearly better, especially below 192 kbps. Converting MP3 to AAC produces files that take less space, sound cleaner on mobile devices, and integrate naturally with YouTube, Apple Music, and modern streaming pipelines. Drop your .mp3 file above.

What Is MP3?

MP3 (MPEG-1 Audio Layer III) is the lossy audio codec Fraunhofer released in 1993. It started the digital music revolution by shrinking CD audio by 10-12x using psychoacoustic compression — sounds the ear cannot easily hear are discarded. MP3 plays on every operating system, every browser, every car stereo, and every Bluetooth speaker built in the last twenty years.

What Is AAC?

AAC (Advanced Audio Coding) is the MPEG lossy codec released around 1997 by Fraunhofer, Sony, Dolby, and AT&T as the official successor to MP3. It uses a more efficient psychoacoustic model, so at 128 kbps AAC sounds noticeably better than MP3 at the same bitrate. AAC is the native audio codec for YouTube, Apple Music, iTunes Store, and most mobile platforms. Files use the .aac, .m4a, or .mp4 extension.

MP3 vs AAC — Format Comparison

PropertyMP3AAC
DeveloperFraunhofer / ThomsonFraunhofer, Sony, Dolby, AT&T
Year19931997
CompressionLossyLossy (more efficient)
Quality at 128 kbpsHiss in cymbals, weak bassCloser to transparent
Native playersEvery device on earthEvery modern OS and browser
File size (4-min track at 128 kbps)~3.8 MB~3.8 MB (but cleaner sound)
Best forMaximum compatibilityStreaming, mobile, Apple ecosystem

When Do You Need MP3 to AAC Conversion?

Command-Line Conversion

Batch-convert an entire folder without opening the interface:

TotalAudioConverter.exe C:\mp3_files C:\aac_out /ConvertTo aac /ProcessRecursively

Add /ProcessRecursively to include subfolders. Save the command in a .bat file for scheduled or automated runs.

Online vs Desktop

FeatureOnline (this page)Total Audio Converter (desktop)
File size limit50 MBUnlimited
Batch conversionOne file at a timeEntire folders at once
Software installNone requiredWindows 7–11
Output optionsStandardFull control
Command-lineNoYes
PrivacyFile uploaded to serverStays on your computer
PriceFreeFrom $29.90

Convert from MP3

Using CoolUtils, it is possible to convert MP3 files to a variety of other formats:

Convert to AAC

Using CoolUtils, it is possible to convert a variety of other formats to AAC files:

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