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Need help?M4R to FLAC — What You Gain and What You Don't
An M4R is an iPhone ringtone: AAC (AAC-LC) audio in an MPEG-4 container. FLAC is a lossless format, so converting an M4R to FLAC stores the decoded ringtone exactly, sample for sample, in a file that any later decode returns unchanged. What FLAC cannot do is recover the detail the AAC encoder threw away when the ringtone was created. The FLAC sounds exactly like the M4R; it is a frozen, lossless copy of a lossy original, and it is several times larger. That is useful when you want to archive your tones in a lossless library or edit one without adding another lossy generation, and pointless if the goal is better sound. Files are uploaded over TLS, processed on xconvert's servers and deleted automatically after a few hours.
Where the M4R came from matters. If it is a tone you made yourself from a song, the best archive is the original song file, not a FLAC of the ringtone. If the M4R is the only copy you have, for example a tone someone sent you or one built in an app you no longer use, a FLAC is a sensible way to keep it safe from further lossy conversions.
How to Convert M4R to FLAC
- Upload your M4R: Drag one or more
.m4rfiles onto the page or click the upload button. Batch upload is supported. - Set the FLAC compression level: FLAC is lossless, so there is no bitrate or quality preset to choose. The Compression level slider runs from 1 to 12: higher numbers make a smaller file and take a little longer, lower numbers are faster with a larger file. The audio is identical at every level.
- Channel, sample rate and trim (optional): Audio Channel offers Original, Mono or Stereo; Audio Sample Rate offers Original or 8000 to 48000 Hz. Trim keeps a section defined by a start time and a duration.
- Convert and download: Click Convert and download the
.flacfile from its card.
M4R vs FLAC at a Glance
| Property | M4R | FLAC |
|---|---|---|
| Compression | Lossy (AAC-LC) | Lossless |
| 30 seconds, stereo | ~480 KB at 128 kbps | Usually a few MB; depends on the sound |
| Further conversions | Each lossy re-encode loses a little more | Decodes to exactly the same samples every time |
| Tags | MPEG-4 tags | Vorbis comments and embedded pictures |
| Licensing | AAC (licensed codec) | Open and royalty-free (Xiph.Org) |
| iPhone ringtone | Yes | No |
| Sound quality | The source | The same as the M4R, no better |
When FLAC Makes Sense for a Ringtone
| Your goal | Best target | Why |
|---|---|---|
| Archive the tones you made in a lossless music library | FLAC | Lossless, tagged and smaller than WAV |
| Edit the tone in a DAW | FLAC or WAV | Both are lossless; WAV opens in more tools |
| Use the tone on Android | MP3 or OGG | Small files in the usual ringtone formats |
| Better sound quality | None | The AAC loss is permanent |
| Keep it as an iPhone ringtone | M4R | iPhone does not use FLAC as a tone |
Frequently Asked Questions
Will converting M4R to FLAC make my ringtone sound better?
No. FLAC preserves exactly what it is given, and what it is given is the decoded AAC from the ringtone. Any detail the AAC encoder discarded is gone. The benefit is that FLAC adds no further loss, so a tone you archive or edit in FLAC stays exactly as it is.
Why is the FLAC so much larger than the M4R?
AAC removes information to reach a low bitrate, about 480 KB for 30 seconds at 128 kbps. FLAC must keep every sample of the decoded audio, so it starts from the size of uncompressed PCM, about 5.3 MB for 30 seconds of 16-bit stereo at 44.1 kHz, and compresses that without loss. How far it shrinks depends on the material.
Does the compression level change how the audio sounds?
No. Every level decodes to the same samples. The level only trades encoding time for file size, and the difference in size between neighbouring levels is usually small.
Should I choose FLAC or WAV?
Both are lossless copies of the decoded ringtone. FLAC is smaller and stores tags properly; WAV is accepted by every editor, sampler and video tool. If a tool insists on WAV, use M4R to WAV.
Can I turn the FLAC back into a ringtone?
Yes. FLAC to M4R encodes FLAC to AAC in an M4R and shows a note under Trim's Duration about Apple's 30-second ringtone length. If you still have the original song in a lossless format, making the ringtone from that gives a better result than going through a FLAC made from an M4R.
Which sample rate and channels should I pick?
Original keeps the ringtone as it is, which is the natural choice for an archive. Change the sample rate only to match an editing project, and use Mono only if you want a smaller file and the tone does not depend on stereo.
Can my iPhone use the FLAC as a ringtone?
No. iPhone lists custom ringtones from .m4r files. Keep the M4R for the phone and the FLAC for your archive; the M4R converter covers every other format you might need.
Can I convert a whole folder of ringtones?
Yes. Batch upload is supported: add every .m4r at once and each is written as its own FLAC with the same compression level, channel and sample-rate settings.
What happens to my files?
They are uploaded over TLS (HTTPS), processed on xconvert's servers and deleted automatically after a few hours. Protected (DRM) files cannot be converted. Free, no sign-up, no watermark.