Free online MP2 to M4R converter

An iPhone custom ringtone must use an Apple-compatible audio file, so an MP2 recording needs to be decoded and saved as AAC in an MPEG-4 container. Converting it also lets you trim a broadcast or archive clip to a ringtone-length file before importing it.

What the MP2 format is

MP2 means MPEG-1 Audio Layer II or MPEG-2 Audio Layer II. It is a lossy format designed for efficient transmission and is still found in digital radio and television broadcasts, DVB streams, older video-production systems, VCD and DVD workflows, and professional audio archives.

Broadcast encoders, older video editors, MPEG authoring software, FFmpeg, and specialist audio tools can create MP2 files. MP2 is not the same as an MP3 file: both belong to the MPEG audio family, but they use different audio layers and are not interchangeable by renaming the extension.

What the M4R format is

M4R is an Apple ringtone file that normally contains AAC audio in an MPEG-4 audio container. It is closely related to M4A; the .m4r extension tells Apple software to treat the file as a ringtone. Renaming an MP2 file to .m4r does not convert its codec or container and will usually produce an unusable file.

AAC in an MPEG-4 container is generally more suitable for iPhone playback and produces a smaller file than uncompressed audio at comparable perceived quality. For the broadest iPhone ringtone compatibility, use a clip of 30 seconds or less, although longer M4R files may work in some software or non-ringtone uses.

Convert the file on 101convert.com

1. Open the MP2-to-M4R converter on 101convert.com; it can be used free without installing software.
2. Upload the .mp2 file and select M4R as the output format.
3. Start the conversion and download the resulting .m4r file.
4. If the source is longer than the intended ringtone, trim it before conversion with an audio editor or use the FFmpeg method below. A format converter may not choose the correct section automatically.
5. Play the result to verify that it contains the desired clip and has not been given a second extension such as .m4r.mp4.

Convert with FFmpeg

FFmpeg is a suitable desktop option when you need precise trimming, fades, channel handling, or repeatable settings. It decodes the MP2 source, encodes AAC, and writes an MPEG-4 audio container in one step.

Install FFmpeg from your operating system's package manager or a reputable FFmpeg distribution, then run:

ffmpeg -i input.mp2 -t 30 -c:a aac -b:a 128k -f ipod ringtone.m4r

-t 30 limits the output to 30 seconds, -c:a aac selects AAC encoding, -b:a 128k sets the bitrate, and -f ipod selects an Apple-compatible MPEG-4 audio output format. Remove -t 30 when creating a file that is not intended to be an iPhone ringtone.

To start at one minute and create a 25-second clip, use:

ffmpeg -ss 00:01:00 -i input.mp2 -t 25 -c:a aac -b:a 128k -f ipod ringtone.m4r

For short fades that prevent an abrupt start or end, use:

ffmpeg -i input.mp2 -t 30 -af "afade=t=in:st=0:d=0.5,afade=t=out:st=29:d=1" -c:a aac -b:a 128k -f ipod ringtone.m4r

Audacity can provide the same editing step through its waveform interface, but AAC/M4A export may require its FFmpeg support. Export as AAC/M4A, confirm that the file is actually AAC audio in an MPEG-4 container, and change only the final extension from .m4a to .m4r.

Import the ringtone to an iPhone

Connect the iPhone and use the Apple device-management workflow available on the computer: Finder on current macOS versions, iTunes on supported Windows or older macOS installations, or the Apple Devices app where applicable. Select the device and add or sync the .m4r file through its tones or ringtone area when that option is provided; then select it under the iPhone's sound settings.

Apple's current supported method for creating and installing custom ringtones can also involve GarageBand on the iPhone. If Finder, iTunes, or Apple Devices does not expose ringtone syncing, import the converted audio into GarageBand, trim it to the permitted length, and export it as a ringtone.

Quality and compatibility limits

• The conversion is lossy to lossy: MP2 is decoded and then re-encoded as AAC, so AAC cannot restore detail removed by the original MP2 compression.
• A bitrate around 128–256 kbps AAC is usually sufficient for a ringtone. A higher AAC bitrate can reduce additional encoding loss but cannot recover MP2 detail.
• Keep the original sample rate unless the target software rejects it; standard AAC sample rates such as 44.1 or 48 kHz are generally compatible.
• Check the output with a media player and, if Apple rejects it, verify that it contains AAC audio, uses an MPEG-4 container, has exactly one .m4r extension, and is not merely a renamed MP2 file.
• Metadata, gapless playback information, and broadcast-specific properties may not survive the re-encoding. The output contains audio only; M4R does not preserve MP2's original encoding.