M4R Converter
Free M4R converter that runs entirely in your browser. No upload, no signup — convert to M4R or from M4R into 200+ supported formats in one click.
Drop any file here or click to browse
All file types supported
About M4R
M4R
M4R is an MPEG-4 audio file format used for iPhone ringtones. M4R is structurally similar to M4A (typically AAC-encoded) but is limited to 40 seconds of audio. M4R files are transferred to iOS devices via iTunes or Finder for use as custom ringtones.
- Developer
- Apple
- Initial release
- 2007
- Compression
- Lossy
- Color depth
- up to 24-bit
- Transparency
- No
Best for
- Creating iPhone custom ringtones
- iOS notification sounds
- Transferring ringtones via iTunes
- Short AAC audio clips for iOS
- Personalizing iPhone alerts
Pros
- +Native iPhone ringtone format
- +Uses efficient AAC encoding
- +Transferred via iTunes or Finder
- +Simple 40-second clip format
Cons
- −Limited to 40 seconds of audio
- −iOS-specific with no other use
- −May carry FairPlay DRM
- −Not a general audio distribution format
How to convert with the M4R converter
- 1
Choose the M4R file you want to convert from your PC, Mac or mobile device, or simply drag and drop it onto the page.
- 2
When your file is uploaded, the output format is preset to M4R. You can add more files to batch-convert them together.
- 3
Click the gear icon and tweak codec, quality, resolution or other options if you need them, then apply to all files if you want.
- 4
Click the Convert button. When conversion completes, download the result to your computer or save it back to Google Drive / Dropbox.
Frequently Asked Questions
What is an M4R file?▼
M4R is the iPhone ringtone format — essentially AAC audio renamed so iTunes recognizes it as a ringtone, usually limited to about 30–40 seconds.
How do I make an iPhone ringtone from a song?▼
Trim the part you want and convert it to M4R (or convert to AAC and rename). Then sync it to your iPhone via Finder or iTunes to select it as your ringtone.
What is the difference between M4R and M4A?▼
Only the extension and purpose — both are AAC in an MP4 container. M4R tells iOS this is a ringtone.
Why is my ringtone file not accepted by my iPhone?▼
Ringtones must be M4R and short (about 30–40 seconds). Convert and trim your clip first, then transfer it to the phone.
Are my audio clips uploaded when converting?▼
No — conversion happens locally in your browser. Your clips never leave your device.
Supported Conversions
Specific converters
100% Free
No hidden fees, no subscriptions, and no limits. Enjoy complete access to all features gratis.
No Signup Required
Start converting immediately without creating an account or sharing email address.
Private & Secure
Your files never leave your device. All processing is completed locally for maximum privacy.
Batch Conversion
Convert multiple files simultaneously to save time. Fast and efficient multi-file queue.
Runs in Browser
Utilizes advanced client-side WebAssembly technology to process files directly inside your tab.
200+ Formats
Supports a wide variety of formats including images, documents, audio, video, and more.
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