# mp3fy

> Converts audio and video files to MP3 in the browser, with no size or duration
> limits. Free, no account, supported by donations.

mp3fy reads a file you already have and re-encodes it to MP3. Most conversions run
entirely on your own device using WebAssembly builds of mediabunny and LAME, so the
file is never uploaded. A handful of formats browsers cannot decode are converted on
mp3fy's servers instead; those uploads are deleted as soon as the job finishes and
the result expires within a day.

What mp3fy does not do: it does not download from YouTube or any other streaming
platform, it cannot fetch media from a URL, and it does not decrypt or work around
copy protection. It hosts no media library of its own. The only thing it converts is
the file you give it.

Interface languages: English, Spanish, Portuguese, German, French, Indonesian.

## Core

- [Converter](https://mp3fy.com/): the tool itself, plus how it works, privacy boundaries and FAQs.
- [All formats](https://mp3fy.com/formats): the full catalogue, one page per format.
- [About](https://mp3fy.com/about): what the project is, how the device and cloud paths differ, who runs it.

## Popular conversions

- [MP4 to MP3](https://mp3fy.com/convert/mp4-to-mp3)
- [M4A to MP3](https://mp3fy.com/convert/m4a-to-mp3)
- [WAV to MP3](https://mp3fy.com/convert/wav-to-mp3)
- [MOV to MP3](https://mp3fy.com/convert/mov-to-mp3)
- [MKV to MP3](https://mp3fy.com/convert/mkv-to-mp3)
- [FLAC to MP3](https://mp3fy.com/convert/flac-to-mp3)
- [WMA to MP3](https://mp3fy.com/convert/wma-to-mp3)
- [OGG to MP3](https://mp3fy.com/convert/ogg-to-mp3)

## Guides

- [Which MP3 bitrate? 128 vs 192 vs 320 kbps](https://mp3fy.com/blog/which-mp3-bitrate)
- [MP3 vs AAC: which is better and when it matters](https://mp3fy.com/blog/mp3-vs-aac)
- [Convert large files to MP3 with no limit](https://mp3fy.com/blog/no-limits-by-design)
- [Is it safe to use online converters?](https://mp3fy.com/blog/convert-without-uploading)
- [Extract audio from video: MP4 to MP3 in your browser](https://mp3fy.com/blog/extract-audio-from-video)
- [Batch convert a folder to MP3](https://mp3fy.com/blog/batch-convert-folder)
- [Blog index](https://mp3fy.com/blog)

## Policies

- [Copyright and acceptable use](https://mp3fy.com/copyright)
- [Privacy policy](https://mp3fy.com/privacy)
- [Terms of use](https://mp3fy.com/terms)
- [Open-source licenses](https://mp3fy.com/licenses)
- [Contact](https://mp3fy.com/contact)