How to Convert Voice Memos, Recordings and Videos to MP3
Updated 17 October 2026 · 5 min read
Turn M4A voice notes, WAV recordings and MP4 videos into MP3 files that play everywhere, and pick a bitrate that keeps them small.
iPhone voice memos are M4A, screen recordings are MP4 or WebM, and recorders export WAV. These formats do not always play in car stereos, basic phones, messaging apps or upload forms. MP3 plays practically everywhere, and the right settings make the file small too.
Step by step
- Open Audio to MP3 and add your files. Up to 20 at once, including MP4 and WebM videos.
- Choose a Bitrate and Channels setting (see below).
- Click Convert to MP3. Each file shows its progress and a player so you can check it.
- Download the MP3s one by one or all together as a ZIP.
For a video, the converter keeps only the soundtrack, which is handy for listening to a recorded class, talk or meeting on the go.
Which bitrate?
| What you are converting | Setting | About per minute |
|---|---|---|
| Voice notes, lectures, interviews | 64 kbps, Mono | 0.5 MB |
| Podcasts and casual listening | 128 kbps | 1 MB |
| Music (the default) | 192 kbps | 1.4 MB |
| Music you want to keep at top quality | 320 kbps | 2.4 MB |
Choose Mono for anything with one voice. It halves the data with no audible loss for speech, so 64 kbps mono sounds as clear as 128 kbps stereo for a lecture.
What to expect
- MP3 is lossy. From WAV or FLAC at 192 kbps or more it sounds excellent, but it is not identical to the source.
- Converting an already compressed file, such as M4A or OGG, loses a little more. Use a higher bitrate if quality matters.
- A higher bitrate than the source cannot add quality. Turning a 128 kbps file into 320 kbps only makes it bigger.
- If a file will not open, your browser cannot read that format. MP3, WAV, M4A, AAC, OGG, FLAC, MP4 and WebM usually work.
Privacy and permission
Decoding and encoding run in your browser, so private recordings never leave your device. The tool converts files you already have; it does not download from streaming sites. Only convert material you own or have the right to use.