How to use M4A to MP3 Converter
- 1Drop your M4A or AAC file into the box.
- 2Pick a quality: 128 kbps for voice, 192 kbps for most audio, 320 kbps for music.
- 3Click Convert to MP3 and wait a few seconds.
- 4Play the preview and click Download MP3.
Why convert M4A to MP3?
M4A is AAC audio in an MP4 container. It sounds great and Apple uses it everywhere, including Voice Memos. But some websites, forms, older car stereos and Windows apps only accept MP3. Converting fixes that in a few seconds.
For a voice memo, 128 kbps is plenty and keeps the file small (about 1 MB per minute). Most voice memos are recorded at a lower bitrate than that, so a higher setting only makes the file bigger.
Quick and private
Voice memos are often personal: interviews, lectures, family moments. This converter works inside your browser, so the recording is never uploaded. Long recordings convert quickly because there is no upload or queue.
Converting a WAV recording instead? Use WAV to MP3. Have a video? Try MP4 to MP3.
Converting on iPhone and Android
On iPhone, open Voice Memos, tap the memo, tap the share button and choose Save to Files. Then open this page in Safari, tap Choose a file and pick the memo from Files. After converting, Download MP3 saves the file to your Downloads folder in Files.
On Android, recordings are usually saved in the Recordings or Music folder and can be picked directly. Some Android recorders already save M4A, which works the same way. Everything happens on the phone, with no upload over mobile data.
Frequently asked questions
How do I convert an iPhone voice memo to MP3?
Share the memo from the Voice Memos app and choose Save to Files, then open this page in Safari, tap Choose a file and pick it from Files. Convert and download.
Does it use FFmpeg?
Most of the time it uses your browser's built-in audio and video engine. For formats the browser can't handle, it uses FFmpeg compiled to WebAssembly (GPL, source linked at /tvid/FFMPEG-NOTICE.txt), a one-time download of about 10 MB that then stays in your browser cache.
Will the MP3 sound worse?
Both are lossy formats, so there is a small generation loss. At 192 kbps or more it is very hard to hear.
Can it convert protected iTunes songs?
No. Files with DRM copy protection can't be converted.
Is there a size limit?
No limit from us; the file is processed on your device.
How long does a conversion take?
A few seconds for a typical voice memo. Even an hour-long recording usually finishes in under a minute on a computer, with a progress bar and a cancel button.