YouTube is without an iota of doubt the most popular video-sharing website. Here, you can find movies, animations, songs, tutorials, and so on. But what if you want to use YouTube music or video as your iPhone’s ringtone. In that case, you must convert YouTube to M4R and trim it to the recommended 40 seconds. So, I’ve already done the legwork for you to unravel these six YouTube to M4R converter apps.
- Part 1. What Is M4R and Why iPhone Uses It
- Part 2. How to Convert YouTube to M4R with All-in-one YouTube to M4R Converter
- Part 3. 5 Recommended Free Online YouTube to M4R Tools
- Part 4. Comparison Table: Which Tool Should You Choose
- Part 5. How to Add M4R to iPhone and Set It as Ringtone
- Conclusion
- FAQ
Key Takeaways
Converting YouTube to M4R is the most practical way to create custom iPhone ringtones, since M4R is the ringtone format recognized by iOS.
- For high-quality, batch conversion, Wondershare UniConverter is the strongest choice, offering direct YouTube conversion, audio trimming, bitrate control, and a safer ad-free desktop workflow.
- For quick one-time conversions, online tools like Onlineconvertfree, Online Audio Converter, FreeConvert, Zamzar, and Convertio are convenient, but they often come with file size limits, ads, or fewer editing options.
- In general, desktop tools are better for speed, stability, and customization, while online converters are better for simple, occasional use.
After conversion, the M4R file can be transferred to iPhone and set as a custom ringtone.
Part 1. What Is M4R and Why iPhone Uses It
What Is M4R?
M4R is a file format specifically used by Apple for iPhone ringtones. It is essentially a variant of the M4A audio format, but with a different extension that allows iOS devices to recognize it as a ringtone file. M4R files are typically encoded using AAC (Advanced Audio Coding), which provides high-quality audio while keeping file sizes relatively small. This makes it ideal for short audio clips like ringtones, which are usually limited to around 30–40 seconds.
Why Does iPhone Use M4R?
Apple uses the M4R format to maintain compatibility and control within its ecosystem. By using a dedicated ringtone format, iOS can easily distinguish between regular audio files and ringtone files, ensuring smooth integration with system settings.
Another reason is optimization. M4R files are designed to deliver high-quality sound with efficient compression, which is important for mobile devices with limited storage. Additionally, using a specific format helps Apple manage how ringtones are imported, synced, and used across devices through iTunes or Finder.
Part 1. How to Convert YouTube to M4R with All-in-one YouTube to M4R Converter
Wondershare UniConverter is one of the best desktop YouTube to M4R converters, offering a powerful all-in-one solution for downloading and converting media files. With its one-click URL paste feature, users can quickly convert YouTube to M4R for iPhone. It also can easily convert YouTube videos to OGG, M4A, and FLAC, ensuring maximum compatibility.
What sets UniConverter apart is its high-speed conversion with GPU acceleration, delivering faster performance without compromising quality. It also features built-in audio conversion and editing tools, allowing users to convert, trim clips, adjust volume, compress files, and customize bitrate for perfect ringtone creation. Additionally, the software supports batch conversion, enabling multiple YouTube videos to be converted to M4R at once. With its ad-free and secure environment, UniConverter provides a reliable and professional solution for high-quality YouTube to M4R conversion.
Wondershare UniConverter - Best YouTube to M4R Converter
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Convert YouTube to M4R and other audio/video file formats with lossless quality.
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Download videos from popular sites like YouTube, Dailymotion, Vevo, etc.
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30X faster conversion speed than any conventional converters.
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Batch video/audio compression and conversion are allowed.
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Toolbox with additional functions like Screen Recorder, VR Converter, GIF Maker, Fixing Media Metadata, and more.
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Supported OS: Windows 10/8/7/XP/Vista, macOS 11 Big Sur, 10.15 (Catalina), 10.14, 10.13, 10.12, 10.11, 10.10, 10.9, 10.8, 10.7.
G2 Rating: ⭐⭐⭐⭐☆ 4.3/5
Ads Density: ⭐☆☆☆☆ (No ads)
File Size Limitation: No limit (local processing on PC/Mac)
Steps to convert YouTube videos to M4R using Wondershare UniConverter:
Step 1 Select an output format.
First of all, click the Download then Convert Mode toggle from the Downloader section, then choose the M4R as the target format under the Audio section. You can also set the output audio resolution or quality. Additionally, you can select the destination folder under the File Location section.
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Step 2 Start to convert YouTube videos to M4R.
Click the button at the bottom of the dashboard to choose the M4R format you need. You can also set audio quality you need.
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Step 3 Start to convert YouTube videos to M4R.
Find the YouTube clip you want to convert to M4R and copy the URL link. After that, go back to Wondershare UniConverter, then click the Download tab. Proceed to click the Add button at the center of the window, and Wondershare UniConverter will start processing your video file and convert YouTube to M4R for iPhone. In no time, you’ll have your new M4R file.
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Part 2. 5 Recommended Free Online YouTube to M4R Tools
Let’s now learn simple online methods to convert the videos to M4R. Luckily, you can use these programs directly on your smartphone or tablet.
1. Onlineconvertfree
Onlineconvertfree is an excellent online YouTube to M4R converter that runs smoothly on any web browser, making it accessible across devices without installation. As its name suggests, it is completely free to use and supports a wide range of audio and video formats. Users can easily convert YouTube MP4 to M4R, as well as other formats like M4A, OGG, AU, FLAC, and AAC for flexible audio output. Beyond media files, the YouTube video to m4r converter also supports converting documents, eBooks, archives, and images, making it a versatile all-in-one converter. With its simple interface and quick processing, Onlineconvertfree is a convenient option for users who need to convert YouTube video to iPhone ringtone without technical complexity.
Pros:
- It supports multiple file formats.
- Simple to use.
Cons:
- It lacks file editing functions.
Trustpilot Rating: ⭐⭐⭐⭐☆ 4.5/5 (300+ reviews)
Ads Density: ⭐⭐⭐⭐☆ (High ads and pop-ups)
File Size Limitation: Around 100MB (varies by file type)

2. Online Audio Converter
Online Audio Converter is another free YouTube MP4 to M4R converter that works seamlessly on all internet-enabled devices. Here, users can convert between 400+ file formats, including MP4 to M4R. Interestingly, you can directly convert YouTube video to iPhone ringtone, saving you some precious time. You can also adjust audio effects like sampling rate, bitrate, channel, and applying crossfade effects.
Pros:
- Fast uploads and conversions.
- It supports 400+ file formats.
Cons:
- Ad-supported UI.
Trustpilot : ⭐⭐⭐⭐⭐ ~4.7/5
Ads Density: ⭐⭐⭐☆☆ (Moderate ads)
File Size Limitation: Around 50–100MB

3. Free Convert
FreeConvert is a popular YouTube to M4R converter that works directly in your browser without requiring any installation. This YouTube video to M4R converter allows users to convert MP4 files into high-quality M4R ringtones, making it a convenient choice for iPhone users to convert YouTube to M4R for iPhone. It also offers advanced customization options, including audio trimming, bitrate adjustment, and output quality control, ensuring better ringtone results. In addition, FreeConvert supports cloud integration, allowing users to upload files from Google Drive, Dropbox, or local storage for a more flexible workflow. With its user-friendly interface and powerful features, FreeConvert is a reliable option for quick and efficient online conversion.
Pros:
- Fast and easy conversion process.
- Supports cloud uploads and multiple formats.
Cons:
- Free version has file size limits.
Trustpilot Rating: ⭐⭐⭐⭐☆ ~4.0/5 (17,000+ reviews)
Ads Density: ⭐⭐⭐☆☆ (Moderate ads, removable with premium)
File Size Limitation: Up to 1GB (free tier)

4. Zamzar
Looking to convert files without losing quality? Zamzar is a great choice. This versatile YouTube to M4R converter supports over 1000 file formats, allowing users to convert audio, video, images, eBooks, and documents with ease. It features a simple, step-by-step conversion process, making it ideal for beginners to convert YouTube video to iPhone ringtone. However, one limitation is its 50MB maximum file size per session, which may not be suitable for larger files.
Pros:
- Converts between 1000+ file formats.
- Straightforward UI.
Cons:
- 50MB conversion limit.
G2 Rating: ⭐⭐⭐⭐☆ 4.5/5
Ads Density: ⭐⭐⭐☆☆ (Moderate ads)
File Size Limitation: 50MB (free version)

5. Convertio
If Zamzar doesn’t meet your needs, Convertio is another reliable online YouTube video to M4R converter. It is fast, easy to use, and supports a wide range of formats, including MP4 to M4R, MP3, FLAC, OGG, AIFF, and more. Users can also customize audio settings such as bitrate, codec, sampling rate, and trimming. However, the free version of this YouTube video to m4r converter has a 100MB file size limit, which may restrict larger conversions.
Pros:
- Convert YouTube MP4 to multiple audio formats.
- Several editing tools.
Cons:
- 100MB conversion limit.
Trustpilot Rating: ⭐⭐⭐⭐⭐
Ads Density: ⭐⭐⭐⭐☆ (Medium–high ads)
File Size Limitation: Around 100MB (free tier)

Part 4. Comparison Table: Which Tool Should You Choose
| Feature | Wondershare UniConverter ($59.95 • Software) | OnlineConvertFree | Online Audio Converter | FreeConvert | Zamzar | Convertio |
| Type | Desktop (PC/Mac) | Online | Online | Online | Online | Online |
| Max File Size | Unlimited (local processing) | Limited (~100MB) | Limited (~50–100MB) | Limited (1GB free tier) | Limited (~50MB free) | Limited (~100MB free) |
| Conversion Speed | ⭐⭐⭐⭐⭐ (GPU accelerated) | ⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐ |
| Batch Conversion | ✅ Yes | ❌ No | ❌ No | ⚠️ Limited | ❌ No | ⚠️ Limited |
| Output Formats | 1000+ formats (MP4, M4R, MP3, etc.) | 200+ formats | 400+ formats | 500+ formats | 100+ formats | 300+ formats |
| Audio Customization | ✅ Advanced (bitrate, trim, edit) | ⚠️ Basic | ✅ Advanced | ✅ Advanced | ⚠️ Limited | ⚠️ Basic |
| Quality Control | ⭐⭐⭐⭐⭐ (lossless support) | ⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐ |
| Ads / Pop-ups | ❌ None | ⚠️ Medium | ⚠️ Medium | ⚠️ Medium | ⚠️ Low | ⚠️ Medium |
| Safety Level | ⭐⭐⭐⭐⭐ (very safe) | ⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| Installation Required | ✅ Yes | ❌ No | ❌ No | ❌ No | ❌ No | ❌ No |
| Best For | Professional / batch conversion | Quick small tasks | Audio-focused conversion | Large file online conversion | Simple conversions | Cross-device use |
Desktop vs Online: Which Method Should You Use for YouTube to M4R Conversion?
When converting YouTube to M4R, the choice depends on your priorities. Desktop tools provide higher audio quality, faster speed, and batch conversion without file size limits, making them ideal for frequent or professional use. They also offer a safer, ad-free experience. In contrast, online converters are convenient for quick, one-time conversions and require no installation, but often come with ads, slower processing, and size restrictions.
Conclusion:
- Choose desktop tools → best for quality, speed, and batch conversion
- Choose online tools → best for quick, simple, one-time use
Part 5. How to Add M4R to iPhone and Set It as Ringtone
Adding an M4R file to your iPhone and setting it as a ringtone is simple once you follow the correct steps. Since iPhones only recognize M4R files as ringtones, you’ll need to transfer the file properly using a computer.
Step 1: Transfer M4R File to iPhone
Connect your iPhone to your computer using a USB cable. Open Finder (Mac) or iTunes (Windows), then select your device. Drag and drop the M4R file into the Tones section. Once transferred, sync your device to ensure the ringtone is added successfully.
Step 2: Locate the Ringtone on iPhone
After syncing, unlock your iPhone and go to Settings > Sounds & Haptics > Ringtone. You should see the newly added M4R file listed among the available tones.
Step 3: Set It as Your Ringtone
Tap on the M4R file name to select it as your default ringtone. You can also assign it to specific contacts by going to the Contacts app, editing a contact, and choosing the custom ringtone.
Tips for Best Results
- Ensure the M4R file is under 40 seconds
- Use high-quality audio for better sound
- Keep file names simple for easy identification
Conclusion
Now you can convert YouTube to M4R on your desktop or smartphone online or offline. However, I recommend Wondershare UniConverter to convert YouTube to M4R for iPhone because it lets users download YouTube videos directly to M4R on their computers. Nonetheless, these online apps are excellent options to have.
FAQ
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1. Why can’t I use MP3 as an iPhone ringtone?
iPhones only support ringtones in M4R format. Therefore, you need to convert audio files such as MP3 or M4A into M4R before using them as ringtones. -
2. What is the usual process to convert YouTube audio to M4R?
The typical process involves downloading the audio or video, converting it to an audio format like MP3 or M4A, trimming it to the desired ringtone length, and then converting it into M4R before transferring it to your iPhone. -
3. How long should my YouTube ringtone be when converted to M4R?
iPhone ringtones are usually limited to about 30–40 seconds. Most users trim their audio to around 30 seconds for optimal compatibility. -
4. How do I transfer an M4R file to my iPhone?
Connect your iPhone to a computer, add the M4R file to the Tones section in iTunes or Finder, sync your device, and then select the ringtone in Settings → Sounds & Haptics. -
5. What audio quality should I use for an M4R ringtone?
A bitrate of around 128–192 kbps is generally sufficient for ringtones. Higher bitrates increase file size without significantly improving sound quality on phone speakers.

Kayla Morrison
staff Editor