Queue AAC audio
Choose one or more non-empty .aac files up to 100 MB each. A source audio control appears when the browser can decode that AAC file.
Free online AAC to M4R converter
Create AAC M4R audio from AAC files.
Queue AAC files, make a new AAC M4R from the first audio stream, then listen to and download every completed result.
- Files not stored
- Queue AAC files
- 100 MB each
Processed by our self-hosted conversion engine
Supported files
AAC in. M4R out.
AACM4R
Add AAC audio files up to 100 MB each. Fileverses creates a new M4R result with this route’s documented conversion profile; review the completed download before using it elsewhere.
How it works
One queue. A new M4R file.
Create AAC M4R audio
Start the queue to have FFmpeg map the first audio stream from each AAC file and encode it as new AAC audio at 160k in an M4R file.
Listen and download
Inspect every completed M4R in the queue when the browser can play it, then download that separately named audio result.
Limits and quality
A new M4R file, with source-specific trade-offs.
Each result is newly encoded AAC audio at 160k in an M4R file, not copied AAC audio. The final size can vary, and a new encode cannot recover earlier audio detail.
Convert AAC nowAAC sources with audio
This route accepts non-empty .aac files up to 100 MB each. The selected file must be readable by the host FFmpeg installation and have an audio stream.
New AAC M4R encode
Each result is newly encoded AAC audio at 160k in an M4R file, not copied AAC audio. The final size can vary, and a new encode cannot recover earlier audio detail.
First audio stream only
The profile maps only the first audio stream, removes source metadata and chapters, and excludes video. It does not preserve alternate audio tracks, subtitles, attachments, original codecs, or metadata, and has no trimming, duration, sample-rate, channel, bitrate, or quality controls.
AAC to M4R FAQ
Questions, answered.
What AAC files can I convert to M4R?+−
This converter accepts non-empty .aac files up to 100 MB each. FFmpeg must be able to read the AAC file and find an audio stream for conversion to succeed.
What does the downloaded M4R contain?+−
A successful result is a newly encoded M4R containing AAC audio at 160k. It contains only the first audio stream from the AAC source.
Can I convert several AAC files at once?+−
Yes. Add multiple supported AAC files to the queue. The browser submits one real server-side conversion at a time, and every successful row receives its own result control and download button.
Will the M4R have a fixed size or restore original quality?+−
No. AAC at 160k does not promise a fixed file size. A new encode cannot restore detail lost in an earlier AAC source, and final size depends on the source and encoder output.
Is this an automatic ringtone maker?+−
No. This route creates an AAC M4R file but has no trimming or duration controls and does not guarantee that a receiving app will accept it as a ringtone. Check the receiving app's current requirements before import.
Does this keep alternate audio tracks or metadata?+−
No. The profile maps only the first audio stream, removes source metadata and chapters, and excludes video. It does not promise alternate-track, subtitle, attachment, original-codec, or metadata preservation.
Can I choose M4R settings or trim the audio?+−
No. This route has no trimming, duration, stream-selection, sample-rate, channel, bitrate, or quality controls. It uses its fixed AAC-at-160k M4R profile.
Are files kept after conversion?+−
Each source and output exists in a temporary server directory only while its conversion runs. The directory is removed whether the job succeeds or fails.