Free online WAV to M4R converter

An iPhone requires a compatible .m4r file for a custom ringtone, while recordings and editing software commonly produce .wav files. Converting the file changes uncompressed or lossless source audio into a smaller AAC-based ringtone that can be imported through an Apple-supported workflow.

What the WAV format is

WAV, also called WAVE, is an audio container used most often for uncompressed PCM audio. Recording applications, digital audio workstations, Audacity, Adobe Audition, GarageBand, audio interfaces, and sound libraries use it because PCM WAV preserves the recorded samples without lossy compression and is easy to edit.

WAV can also contain other codecs, but the common PCM variant is large: stereo 16-bit audio at 44.1 kHz uses about 1,411 kbps before metadata. File size increases with sample rate, bit depth, and channel count.

What the M4R format is

.m4r is the filename extension Apple uses for iPhone ringtone files. It normally contains AAC audio in an MPEG-4 container, making it similar internally to an .m4a file with a different extension.

AAC produces much smaller files than uncompressed PCM while retaining suitable quality for phone playback. An iPhone ringtone should normally be 30 seconds or shorter; trim longer audio before conversion because an excessive duration can prevent import or ringtone selection.

How to convert the file

Using 101convert.com

1. Open the WAV-to-M4R converter on 101convert.com.
2. Upload the .wav file.
3. Select M4R as the output format and start the conversion.
4. Download the resulting .m4r file.

Trim the source to the required ringtone length before uploading, or use a converter that provides a trim option. An online conversion requires no installed software; avoid uploading recordings containing sensitive material unless the service's handling policy is acceptable.

Using FFmpeg

FFmpeg provides direct control over the AAC bitrate, duration, sample rate, and channel count:

ffmpeg -i input.wav -vn -c:a aac -b:a 128k -t 30 -f mp4 output.m4r

Replace the input and output filenames as needed. The -t 30 option limits the result to 30 seconds; omit it when the source is already within the destination's limit. Use -b:a 96k for a smaller file or -b:a 192k for a higher bitrate. If the source uses an unusual format, add -ar 44100 -ac 2 to resample to 44.1 kHz stereo.

Importing the ringtone to an iPhone

On macOS or Windows, connect the iPhone and use the available Finder, iTunes, or Apple device-management ringtone controls to add and sync the .m4r file. The exact controls depend on the operating-system and Apple software version; an .m4r extension by itself does not make a file appear as a ringtone.

If desktop syncing does not expose ringtone controls, import the audio into GarageBand on the iPhone, trim it to 30 seconds or less, then use Share → Ringtone → Export. After installation, select it under Settings → Sounds & Haptics → Ringtone.

Quality and compatibility limits

WAV-to-M4R conversion is usually lossy because AAC removes audio information. Keep the original WAV for editing and archiving; converting the M4R back to WAV cannot restore discarded detail.

A 128 kbps AAC file is generally adequate for a ringtone. Source audio with multiple channels, an unsupported sample rate, or an unusual codec may require downmixing or resampling. The output must contain a supported MPEG-4/AAC stream, meet the duration limit, and be transferred through an Apple-supported method. Renaming a WAV or an unrelated .m4a file to .m4r does not perform the conversion.