Trim M4R

How to Trim an M4R Ringtone Online

1. Upload Your M4R: Drag and drop the .m4r file or click to browse. This page takes M4R ringtones, such as one downloaded from a ringtone site, one you made earlier, or one copied off a computer.
2. Select the Part to Keep: Drag the start and end handles on the timeline, or type exact values into Start Time (s) and End Time (s) under Precision Trim. Use play to check the selection; keep it at 30 seconds or less if the tone is going back onto an iPhone.
3. Check the Output Setting: In Output Setting, choose Same As Input or M4R so the result is still an iPhone ringtone. The kept audio is re-encoded as AAC at roughly the source bitrate.
4. Trim and Download: Click "Trim & Download". The file is uploaded over HTTPS, trimmed on xconvert's servers and deleted automatically after a few hours. No sign-up, no watermark.

Why Trim an M4R File?

M4R is the file type iPhone uses for custom ringtones: AAC audio (AAC-LC) in an MPEG-4 container with the .m4r extension. It is the same container and codec as M4A; the extension is what tells iOS, the Finder and iTunes that the file is a tone. Trimming keeps the selected part of an existing ringtone and throws away everything before and after it, without leaving the M4R format.

Common reasons to trim a ringtone you already have:

• It is longer than Apple's limit. Apple Support says ringtones can be up to 30 seconds long. Tones made to the 40-second figure quoted from the iTunes era, which is not in Apple's current documentation, can run long. Trim them to 30 seconds or less.
• It starts with silence or a slow intro. A tone that takes four seconds to get going is a tone you never hear before you answer. Move the start handle to where the sound actually begins.
• You want a shorter alert from the same sound. Keep just the first few seconds of a ringtone to use as a text tone.
• The ending is abrupt. Pull the end handle back to a natural pause so the loop sounds clean when the phone keeps ringing.

Trim keeps one continuous section. To delete a section from the middle of a tone and join the rest, use Cut M4R instead. If your source is not an M4R yet, start with Audio to M4R, which trims and converts in one step.

Trim vs Cut: Which M4R Tool?

Property	Trim M4R	Cut M4R
What you select	The part to keep	The part or parts to remove
Result	One continuous section	The remaining segments joined into one tone
Typical use	Shortening a tone, skipping a slow intro	Removing a gap, a word or a bar in the middle
Controls	Start/end handles, Start Time (s) and End Time (s)	Split points with a Keep/Remove toggle per segment
Output	M4R (AAC)	M4R (AAC)

M4R Length and File Size

AAC size is bitrate (kbps) × seconds ÷ 8 = kilobytes. Trimming shrinks the file in proportion to the time you remove.

Length	128 kbps M4R	256 kbps M4R
5 seconds (text tone)	~80 KB	~160 KB
10 seconds	~160 KB	~320 KB
15 seconds	~240 KB	~480 KB
25 seconds	~400 KB	~800 KB
30 seconds (Apple's limit)	~480 KB	~960 KB

How to Set the Trimmed Tone as Your Ringtone on iPhone

Getting the .m4r onto the phone, using the usual routes:

• Mac (macOS Catalina or later): connect the iPhone, select it in the Finder sidebar and drag the trimmed .m4r onto it.
• Windows: connect the iPhone and add the tone with iTunes.
• iPhone only: save it to Files, import it into GarageBand on the iPhone, then Share > Ringtone, the route Apple documents for audio that is not DRM-protected. The export can be used as a Standard Ringtone or Standard Text Tone (GarageBand for iPhone User Guide).

Then pick it under Settings > Sounds & Haptics > Ringtone (iPhone User Guide), or for one person, Contacts > the contact > Edit > Ringtone or Text Tone.

Using the Tone on Android?

Android ringtones are usually MP3 or OGG, not M4R. Convert the trimmed tone with M4R to MP3 for an Android phone.

Frequently Asked Questions

Will trimming change the sound of my ringtone?

The trim lands where you set it, and the kept audio is re-encoded as AAC at roughly the source bitrate. That is one more lossy generation, which is very hard to hear on a phone speaker, but avoid trimming the same tone over and over; go back to the original file if you need another version.

How long should the trimmed ringtone be?

30 seconds or less. That is the length Apple's support article gives for ringtones, and the GarageBand for iPhone guide gives 30 seconds as the maximum for exported ringtones. For a text tone, a few seconds is usually enough.

What is the difference between Trim M4R and Cut M4R?

Trim keeps the selection: you mark one section and everything outside it is removed. Cut removes the selection: you split the tone into segments, mark the unwanted ones as Remove, and the rest is joined back together.

Can I trim an M4R on my iPhone?

Yes. Open this page in Safari, upload the .m4r from Files, set the handles and trim. Save the result to Files, then use a computer or the GarageBand route to install it as a ringtone.

Can I trim an M4A or MP3 here?

This page takes M4R files. For other formats, Audio to M4R converts and trims in one step, or Trim M4A handles M4A files you want to keep as songs.

Will the trimmed file still show up as a ringtone?

Yes, as long as it keeps the .m4r extension and is 30 seconds or less. The output stays AAC in an MPEG-4 container with the .m4r extension.

Is my ringtone file private?

Trimming happens on xconvert's servers. Files are uploaded over TLS (HTTPS) and deleted automatically after a few hours, and no account is needed.