MP3 Converter

Convert any audio or video file to MP3 — right in your browser.
No installs, no watermarks, 100% free.

Drop your files here to upload
Video or audio — MP4, MOV, MKV, WAV, M4A…

Stop replaying it — read it instead.

Convert anything to MP3 in three steps

A free MP3 converter for any file — audio or video, any common format goes in, MP3 comes out.

  1. Step 1

    Add your file

    Drop in any audio or video — MP3, WAV, M4A, AAC, MP4, MOV, MKV and many more.

  2. Step 2

    Pick MP3 and bitrate

    MP3 is the default. Choose a bitrate for the size-versus-quality trade-off, then hit Convert.

  3. Step 3

    Download your MP3

    Save each file or grab them all as a Zip. Nothing leaves your device.

One converter, every file

Whatever you've got, if it has sound this turns it into a universal MP3.

Any audio format

WAV, M4A, AAC, OGG, FLAC, WMA and more become MP3.

Any video format

MP4, MOV, MKV, AVI, WebM and more — keep just the audio as MP3.

Upload-ready files

Make any recording fit the MP3-only uploads some sites require.

Smaller files

Shrink heavy audio and video down to a portable MP3.

Works anywhere

Runs in any browser on any OS — nothing to install.

Then transcribe it

Convert to MP3, then transcribe the audio with SlayScribe.

Why MP3, and why in the browser

MP3 is the most universally supported audio format there is — every phone, car, player, and editor reads it. A converter that takes any file and outputs MP3 means you never have to worry whether something will play. And because the conversion runs locally in your browser, your files stay private: they're never uploaded to a server.

Frequently asked questions

What can I convert to MP3?

Any common audio (WAV, M4A, AAC, OGG, FLAC, WMA) or video (MP4, MOV, MKV, AVI, WebM) file.

Is it free?

Yes — no account, no email, no limits. It runs entirely in your browser.

Are my files uploaded?

No — conversion happens on your device from start to finish.

Can I convert in batches?

Yes — add many files and download them together as a Zip.

What bitrate should I pick?

128 kbps for voice, 192–320 kbps for music.

Can I get a transcript instead?

Yes. Convert to MP3, then use SlayScribe to transcribe it.

More converters

All formats →Audio to MP3Video to MP3

Need the words, not just the audio?

SlayScribe turns any audio or video into accurate text in seconds — transcripts, captions, and subtitles in 98+ languages.