MP3 to M4A converter
Convert MP3 files to M4A with TLS uploads and automatic deletion. AAC audio in an MPEG-4 container, common on Apple devices.
Drop a MP3 file, or click to browse
Converts to M4A · runs live, right now
How it works
Drop your file
Drag a MP3 file in, or click to browse. No account needed to try it.
We convert it
Secure upload, converted to M4A in our ffmpeg pipeline.
Download the result
Grab your M4A file immediately, or find it later in your dashboard.
Why convert MP3 to M4A?
Both MP3 and M4A use lossy compression, so the conversion mainly changes compatibility, not quality. The main reason to convert MP3 to M4A is compatibility: M4A plays on virtually any device or app without an extra codec, while MP3 doesn't always. If you're sharing a file with someone else, sending it to a tool that expects a specific format, or archiving it for the long term, M4A is usually the safer target.
Format comparison
| MP3 | M4A | |
|---|---|---|
| Extension | .mp3 | .m4a |
| MIME type | audio/mpeg | audio/mp4 |
| Compression | lossy compression | lossy compression |
| Category | audio | audio |
Common reasons to convert MP3 to M4A
- Fitting more tracks on a device or app with limited storage
- Meeting a file-size limit for email or upload
- Standardizing on one format so every file behaves the same way in your workflow
Your file, handled carefully
Uploads use TLS in transit and AES-256 SSE-S3 at rest in production (when the production S3 credential gate is enabled), are processed in an isolated job, and deleted on the schedule you choose — as fast as immediately. We don't index, search, or share files between accounts. Read the full security model →
Frequently asked questions
Is converting MP3 to M4A free?
Yes — the Free plan includes 50 conversions every month, including MP3 to M4A. Paid plans raise that limit.
Will I lose quality converting MP3 to M4A?
M4A is aac audio in an mpeg-4 container, common on apple devices. We use the highest-quality encoder settings by default so visual or data loss is minimized.
Do you keep a copy of my file?
Files are deleted automatically based on your plan's retention options. Free accounts can keep results for 1h or 24h; Pro and above add options such as delete-immediately and 7 days.
What is MP3?
Universally supported lossy audio format.
What happens if a conversion fails?
You get a clear error message and the job is marked failed in your history — we never silently drop a file. Retry is one click. Monthly quotas count attempts (including failures) because processing starts as soon as the job is created.