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Convert OPUS to M4R - Create Custom iPhone Ringtones

Turn OPUS audio into iPhone ringtones. Create custom M4R files instantly.

Step 1: Upload your files

You can also Drag and drop files.

Step 2: Choose format
Step 3: Convert files

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Turn Any OPUS File Into an iPhone Ringtone

OPUS files deliver excellent audio quality at small file sizes, but iPhones only accept M4R format for ringtones. Whether you have a voice memo, podcast clip, or music file in OPUS format, converting to M4R lets you use it as your custom ringtone.

In our testing, OPUS files convert to M4R cleanly with no noticeable quality loss. The compression methods are different, but both formats handle audio efficiently. Your OPUS files will sound just as good as ringtones.

How to Convert OPUS to M4R

  1. Upload your OPUS file - Drag and drop or click to select your audio
  2. Select M4R output - Choose M4R as your target format
  3. Download your ringtone - Save the M4R file and transfer to your iPhone

The entire process takes seconds. No account required, no software to install.

Why OPUS Needs Converting

OPUS is a modern audio codec developed for internet streaming and real-time communication. Apps like Telegram, WhatsApp, and Discord use OPUS for voice messages because it maintains clear audio at low bitrates.

However, Apple designed the iPhone to use only M4R files for ringtones. M4R is essentially an AAC audio file with a different extension, optimized for the iPhone's audio system. No workaround exists - if you want a custom ringtone, you need M4R format.

Key differences:

  • OPUS - Open-source codec, excellent for speech and music, used in messaging apps
  • M4R - Apple's ringtone format, AAC-based, limited to 40 seconds maximum

Common Use Cases

Voice Message Ringtones

Received a funny voice message you want as your ringtone? Voice messages from Telegram and WhatsApp are often saved as OPUS. Convert the clip to M4R and assign it to a specific contact.

Podcast Clips

Some podcast apps download episodes in OPUS format. Extract your favorite intro music or memorable quote and turn it into a ringtone.

Music from Web Apps

Many browser-based audio tools export in OPUS format. Convert your recordings or downloaded clips to M4R for iPhone use.

Ringtone Length Requirements

iPhone ringtones must be 40 seconds or shorter. If your OPUS file is longer, you have options:

  • Trim the audio before converting
  • Convert the full file and trim in iTunes or GarageBand
  • Use a separate audio editor to cut the best 30-40 second section

Most users find 20-30 seconds ideal - long enough to be recognizable, short enough that it does not become annoying if you miss a call.

Alternative Formats

If you need more flexibility than ringtones, consider these options:

  • OPUS to M4A - For general iPhone audio playback in iTunes and Apple Music
  • OPUS to MP3 - For maximum compatibility across all devices

M4R is specifically for ringtones. For regular music listening, M4A or MP3 are better choices.

Works on Any Device

Convert OPUS to M4R directly in your browser:

  • Windows, Mac, Linux, Chromebook
  • Chrome, Firefox, Safari, Edge
  • iPhone, iPad, Android

Processing happens locally. Your audio files stay private and never leave your device.

Pro Tip

OPUS files from messaging apps often include silence at the start and end. Trim these silent portions before converting to get a cleaner ringtone that starts immediately when someone calls.

Common Mistake

Creating ringtones longer than 40 seconds. iPhone silently rejects oversized files. Keep your clip under 40 seconds, ideally 20-30 seconds for best results.

Best For

Converting voice messages, podcast clips, or web audio recordings saved in OPUS format into custom iPhone ringtones for personal use or contact-specific tones.

Not Recommended

Don't use this for general music playback. M4R is strictly for ringtones. For music, convert to M4A or MP3 instead.

Frequently Asked Questions

OPUS is a modern audio codec designed for internet streaming and real-time communication. It's commonly used in messaging apps like Telegram and WhatsApp for voice messages, and in web applications for audio recording.

iPhone only accepts M4R format for ringtones. This is a deliberate limitation by Apple. Regardless of audio quality, any file that isn't M4R won't appear in your ringtone options.

Quality loss is minimal and typically imperceptible. Both OPUS and M4R (AAC) are efficient codecs. For short ringtone clips, you won't notice any difference in sound quality.

iPhone ringtones must be 40 seconds or shorter. Files longer than 40 seconds won't work as ringtones. Most effective ringtones are 20-30 seconds.

Connect your iPhone to a computer and drag the M4R file into iTunes or Finder. Alternatively, use AirDrop from a Mac. The ringtone will appear in Settings > Sounds & Haptics > Ringtone.

Yes. Voice messages from these apps are often saved as OPUS files. Locate the audio file in your app's storage folder, convert it to M4R, and use it as a ringtone.

Yes, completely free with no limits. No account registration required. Convert as many OPUS files to M4R as you need.

Yes. The converter works in Safari on iPhone. However, getting the M4R file into your ringtone settings still requires connecting to a computer with iTunes or Finder.

M4R and M4A use the same AAC audio codec. The only difference is the file extension. M4R signals to iPhone that the file is a ringtone, while M4A is for general music playback.

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