Convert M4A files — voice memos, iPhone recordings, downloaded songs — to universally-compatible MP3. Runs entirely in your browser.
Select one or multiple .m4a files — batch conversion supported
M4A is Apple's default audio format — used for Voice Memos, GarageBand exports, and songs downloaded from iTunes. While most modern devices play M4A fine, it's still rejected by many older car stereos, some Android apps, video editing software, and web platforms. MP3 remains the one format that plays absolutely everywhere.
Voice memos & recordings — share iPhone voice memos with anyone, on any device.
Car stereos & older hardware — many systems only read MP3 from USB drives.
Video editing & podcasting tools — some software still expects MP3 audio tracks.
No. Conversion runs entirely in your browser using the Web Audio API to decode and a small JavaScript MP3 encoder to encode. Files never leave your device.
At 192 kbps or higher, most listeners can't tell the difference. Choose 320 kbps for maximum quality.
Yes — batch conversion is fully supported. Download individually or click Download All.
It uses your browser's built-in audio decoder plus a tiny ~40KB encoding library, instead of a large video engine, so the page is ready almost instantly.