MP3 to M4A Converter: Free, No Upload

Convert MP3 to M4A in the browser for Apple devices, or trim a clip into a ringtone

FromMP3To

Quality

Higher kbps sounds closer to the original and makes a bigger file

M4A · 160 kbps · original channels · original sample rate

Your files never leave this device

How to convert MP3 to M4A

Audio and video files
Open MP4, MOV, MKV, WEBM, M4A, WAV, FLAC, OGG, OPUS, AAC, and MP3 files, and save them as MP3, WAV, M4A, FLAC, or OGG
Sound from a video
Save the sound of a film, a talk, or a music video as its own file, and keep it unchanged when you pick the format marked Original
Many files at once
Drop a whole folder, convert every file with one press, and save them all with Download all
Settings you control
Pick the bitrate, keep one part with Trim, make it mono, change the sample rate, fade the ends, or even out the loudness
Nothing is uploaded
Your files convert on your device, so a private recording never leaves it
Works in your browser
Use it on Windows, Mac, iPhone, iPad, or Android, with nothing to install and no account

M4A is AAC sound in an MP4 container. Converting MP3 to AAC this way suits Apple devices and iTunes.

Detail	MP3 compared with M4A
Codec	MP3 uses MP3 sound. M4A uses AAC, which needs a lower bitrate for the same sound.
Quality levels	Small file is 96 kbps, Standard is 160 kbps, and High is 256 kbps, the bitrate of iTunes Store songs.
Size per minute	At 160 kbps an M4A is about 1.2 MB per minute. At 256 kbps it is about 1.9 MB.
Apple devices	iPhone, iPad, Mac, and Apple Music use AAC first. MP3 plays there too.
Quality	No quality gain: the M4A cannot sound better than the MP3. Use High so it does not sound worse.
Ringtone length	Keep a ringtone at 30 seconds or less, the length GarageBand allows. Use Trim to cut the part you want.

MP3 to M4R ringtone
For an MP3 to M4R ringtone, trim the MP3 and convert it to M4A. Rename the file from .m4a to .m4r, then drag it onto the iPhone in Finder.
Which bitrate
Standard, 160 kbps AAC, suits most uses. Pick High, 256 kbps, for music, and Small file for speech.
On Mac
For MP3 to M4A Mac users can convert in the browser or in the Music app: set Import Settings to AAC Encoder, then choose File, Convert, Create AAC Version.
On iPhone
For MP3 to M4A iPhone Safari works: tap the drop area, pick the MP3 in Files, and convert. The M4A saves to Files.

How do I convert MP3 to M4A on Mac?: In Safari or Chrome, drop the MP3 and press Convert. The Music app can also do it with the AAC Encoder setting.
What is good MP3 to M4A converter software?: You may not need software. This MP3 to M4A converter runs in the browser with no install. The Music app on Mac and iTunes on Windows also convert.
Is M4A better than MP3?: At the same bitrate, AAC in M4A usually sounds a little better. But an M4A made from an MP3 is never better than that MP3.
Does MP3 to M4A lose quality?: A little, because the sound is encoded again. At High, 256 kbps, the loss is hard to hear.
Can I make an iPhone ringtone from an MP3?: Yes. Trim the MP3 to 30 seconds or less, convert it to M4A, rename it to .m4r, and add it to the iPhone with Finder or iTunes.
Which bitrate should the M4A have?: 160 kbps for most music and speech, 256 kbps to match iTunes Store songs, and 96 kbps for voice.
Are my MP3 files uploaded?: No. They are converted in this tab and saved by the browser.

An MP3 to M4A online service gets a copy of your music. Your copy stays with you: you get MP3 to M4A free, in the browser, on your device.

Suparelay calls any phone from this browser, on a Mac or an iPhone.