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hushvert

MP3 converter

MP3 is the audio equivalent of JPG: not the most modern choice, but the one that works everywhere without questions. The converters below run ffmpeg compiled to WebAssembly inside your browser, so recordings, voice memos and music files are converted without being uploaded to anyone.

What is MP3?

MP3 is the audio format that ate the world in the late 1990s, and it remains the most universally supported way to store sound: lossy compression at roughly a tenth of CD size, playable on literally anything with a speaker. Newer codecs like AAC and Opus beat it on quality per kilobyte, but no format comes close to its compatibility across car stereos, ancient MP3 players, browsers, editing software and upload forms.

Convert MP3 to another format

Convert another format to MP3

Common questions about MP3

What is an MP3 file?
MP3 (MPEG-1 Audio Layer III) is a lossy compressed audio format that became the de facto standard for music files. It throws away sound data your ears are least likely to notice, which is how it gets files down to roughly a tenth the size of an uncompressed WAV. That small size and near-universal playback support are why it stuck around for decades, even though newer codecs are more efficient at the same bitrate.
Is MP3 lossy or lossless, and how good does it sound?
MP3 is lossy: once audio is encoded to MP3, the discarded detail is gone for good, and re-encoding an MP3 again compounds the loss. At higher bitrates (256 to 320 kbps) most people cannot tell it apart from the original in normal listening. For archiving or editing you usually want a lossless format like WAV or FLAC instead, then export to MP3 only for the final, shareable copy.
What can I convert an MP3 to on hushvert?
You can convert MP3 to WAV (uncompressed, for editing), to M4A (AAC, a more modern lossy format), or to OGG (Vorbis, common for open-source apps and games). All three run client-side in your browser via WebAssembly, so the MP3 never leaves your device. You can confirm that in airplane mode or by watching the Network tab: no upload happens.
Can hushvert turn other audio and video files into MP3?
Yes. MP3 is one of the most-supported targets on hushvert. You can convert WAV, M4A, FLAC, OGG, AAC, AIFF, and WMA audio to MP3, and you can also pull the audio track out of video files (MP4, MOV, MKV, WebM, and AVI) straight into MP3. Every one of these runs in the browser with no upload, free and unlimited, no account needed.
Will converting WAV or FLAC to MP3 lower the quality?
Converting from a lossless source like WAV or FLAC into MP3 does introduce lossy compression, so the MP3 will be smaller but not a perfect copy. At a high bitrate the difference is hard to hear for most listeners, and the payoff is a file that plays anywhere and takes a fraction of the space. Keep your original WAV or FLAC if you may need to edit or re-export later.