TeraConvertTeraConvert

MP3 Converter for Mac

Turn almost anything into MP3 without sending it anywhere. The converter runs on your Mac, in this tab, and the desktop app does whole folders at a time.

Conversion Successful
100% local. Your file is processed in this tab and never uploaded.

Why convert on your Mac instead of online

Most MP3 converters for Mac are web forms with a queue behind them. You hand over the file, it travels to a server in a country you did not pick, and a link comes back. That is a strange arrangement for a voice memo about your salary, a client interview, or a recording of your kid's recital, and it is the reason this page works differently: the conversion happens in the browser tab on your own machine, and the file never goes anywhere.

Drop in an M4A from Voice Memos, a WAV from a session, a FLAC off a hard drive, or a video you only wanted the audio from. Pick MP3. The tab decodes it and writes the new file locally, offline if you want, which you can prove by turning the Wi-Fi off mid-conversion and watching it finish anyway.

Every MP3 conversion, one page each

Frequently Asked Questions

Is this MP3 converter really free to use?
The first conversion runs with no account and no payment. After that, converting needs a free sign-in and Pro, which is bought once and has a 14-day money-back guarantee. No subscription, no per-file charge, no watermark on anything it writes.
What can I convert to MP3 on a Mac here?
Audio files like WAV, FLAC, OGG, AAC, M4A, AIFF, WMA, and Opus, plus the audio track of MP4, MOV, MKV, and WebM video. Each of those has its own page with the details.
How big a file can the browser handle?
100 MB for audio input and 500 MB for video. Above that the desktop app takes over, since it runs FFmpeg natively and has no size ceiling.
Does it work offline?
Once the page has loaded, yes. Conversions never touch the network. The desktop app is offline apart from a license check that runs at most once a day.
Can I trim or adjust the audio first?
Yes. Open the editor before converting to set a trim range, change the volume, or add a fade in or out. Those edits are applied while the MP3 is encoded rather than in a second pass.

Converting a folder, not a file?

The desktop app converts an entire folder to MP3 in one run through native FFmpeg, with no size cap and nothing uploaded.

Get TeraConvert for MacmacOS on Apple Silicon. One-time Pro purchase, 14-day money-back guarantee.